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Description
ET8215C ASTRONOMIC 7-DAY 2-CIRCUIT ELECTRONIC CONTROL, 120-277 VAC, 2-SPST, INDOOR METAL ENCLOSURE, INTERMATICThis series offers an easy way to upgrade from a basic mechanical time switch to an electronic time switch. These timers will allow for up to the minute programming, battery backup for power loss, up to 28 events total, and automatic daylight saving time corrections without the need of user interaction. They come in standard 7 day astronomic versions. Selector switch to determine input voltage between 120 277 VAC Up to 28 events total To the minute
This series offers an easy way to upgrade from a basic mechanical time switch to an electronic time switch. These timers will allow for up-to-the-minute programming, battery backup for power loss, up to 28 events total, and automatic daylight saving time corrections without the need of user interaction. They come in standard 7-day astronomic versions.
- Selector switch to determine input voltage between 120-277 VAC
- Up to 28 events total
- To-the-minute accuracy
- Temporary override or permanent manual override
- Automatic Daylight Saving Time adjustment
- Astronomic models enable dusk-to-dawn scheduling
| Has Wi-Fi | No | Operation Mode | 7 day |
| Operation Features | Astronomic | Electronic Series | ET8000 Series |
| Input Voltage Range(s) | 120-277 VAC, 50/60 Hz | Number Of Circuits | 2 |
| Minimum Pulse Time | 2 sec | Minimum ON/OFF Times | 1 min |
| Maximum ON/OFF Operations | 28 | Backup Type | Battery |
| Battery Service Type | Field Serviceable | Battery Type | AAA |
| BatteryWeightgrams | 22 | CA Prop 65 Message | Please see the Warning @ www.P65Warnings.ca.gov |
| California Proposition 65 | Lead | Chemical Composition of the Battery Cell | Alkaline-Manganese-Dioxide |
| Color | Gray | Country of Origin (Intermatic) | CHINA |
| CSA Certification | cCSAus | Daylight Savings Adjustment | Automatic |
| Electronic Ballast Load Ratings Ranges | 1 A, 120-277 VAC | Enclosure Type | Indoor type 1 metal |
| Inductive Load Ratings Ranges | 30 A, 120/240 VAC | LithiumContentgramsinBattery | N/A |
| Magnetic Ballast Range(s) | 20 A, 120-277 VAC | Material | Metal |
| Maximum ON/OFF Times | Indefinite | Maximum Power Consumption (W) | 6 W |
| Maximum Pulse Time | 2 sec | Motor Load Ratings Ranges | 1 HP, 120 VAC; 2 HP, 240 VAC |
| Number of Batteries Included | 2 | NumberofLithiumionCellsinBattery | N/A |
| NumberofLithiumMetalCellsinBattery | N/A | ON/OFF Operations | 28 |
| Other Certifications and Compatibilities | Green Energy, Title 20 | Resistive Load Ratings Ranges | 20 A, 28 VDC; 30 A, 120/240 VAC |
| RoHS Certification | N | Switch Type | 2xSPST, 1xDPST or Pulse |
| Tungsten Range(s) | 5 A, 120-240 VAC | Voltage Selection Type | Selector Switch |
| Warranty Period | 1-Year limited | WattHoursPerBattery | N/A |
| Wire Size Max | #8 AWG | Wire Size Min | #14 AWG |
| Wiring Option | Terminals | Operating Temperature Max (°C) | 40 |
| Operating Temperature Max (°F) | 104 | Operating Temperature Min (°C) | -40 |
| Operating Temperature Min (°F) | -40 | Product Depth (in) | 3.437 |
| Product Depth (mm) | 87.3 | Product Height (in) | 7.875 |
| Product Height (mm) | 200 | Product Width (in) | 5.125 |
| Product Width (mm) | 130.2 | Unit Carton Height (in) | 8.001 |
| Unit Carton Length (in) | 5.251 | Unit Carton Weight (lb) | 2.994 |
| Unit Carton Width (in) | 3.251 | Units Per Pallet | 384 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Great sound deadening material with easy installation.
Size: 36 sqft, Size: 36 sqft
This sound-deadening mat was easy to install on the roof of my Toyota FJ Cruiser. It significantly stiffened the roof and dramatically reduced the wind noise inside the vehicle caused by my roof rack and lights. I can actually carry on a conversation again without shouting while driving on the freeway.
The 36-square-foot package was enough for my application, with about three sheets left over. The tiles adhered well to the metal without any special surface preparation. I only wish I had done this sooner.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
Model: SLH20025
I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed.
Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands.
Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application.
I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in.
My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined.
If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do.
Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat.
Update Nov, 2025
After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation
Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture
I used it on four vehicles now and have I have not been paid to review and purchased every order myself.
3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
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Reviewed in the United States on September 29, 2025
★★★★★ 5
Top quality
Model: SLH20025
This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels.
After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell.
At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Made a big improvement in cabin noise—highly recommend
Model: SLH20025
Siless Hybrid made a huge difference in reducing noise in the floor of my truck cabin. In some areas, there was basically just bare sheet metal between the inside and outside, so adding this really helped the truck feel more solid and noticeably quieter on the road.
I used Kilmat on the doors, and honestly I wish I had used Siless Hybrid there too, but it was too late by the time I realized the difference. This material is very sticky, easy to cut, and simple to apply, which made the install pretty smooth.
Just a heads-up: the tacky side gets messy and will bond to clothing really easily, so be careful during installation. Overall, I’d definitely buy it again—great product with real results.
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Reviewed in the United States on December 2, 2025
★★★★★ 5
Very good product at a fair price
Model: SLH20025
Very good sound deadener and heat shield, it is a bit sticky to work with, but easy to shape and cut
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Reviewed in the United States on April 19, 2026
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