Advertise Here view pricing Protect 2nd Gen Smoke/CO Battery White Share this post: View Details $119.0 Protect 2nd Gen Smoke/CO Battery White Similar products SECO-LARM Enforcer SM-200Q/WH Surface Mount Magnetic Contact Switch, Normally Closed View $1.38 INSTEON Hidden Door Sensor View $34.99 DSC BV-600/UL Twin PIR Motion Sensor View $38.41 Visonic TOWER-20AM Outdoor Octa-PIR Mirror Detector View $175.0 Nest Detect View $49.0