3V Photo Lithium Battery, E2 CR2 Driveway Medic The O-ring is used to

The O-ring is used to seal the housing canister to the housing cap to prevent leaks

Bare Copper Shielding

summer and fall

using this timer cuts down on wasted energy use since lights and fans can be timed to only be On when needed

3V Photo Lithium Battery, E2 CR2 Driveway Medic The O-ring is used toEnergizer E2, CR2, 3V, photo lithium battery, comparable to Duracell #DLCR2. 3 Volt e2 Photo Lithium Battery is designed for use with cameras, photoflash, calculators, pocket pagers, watches, memory backup and other high drain applications. 3 Volt e2 Photo Lithium Battery performs even in extreme temperatures. Storage life lasts up to 10 years.