Emergency lights last up to 1 1/2 hours during a power outage. Can hang in a hallway, basement or any place you like. Includes 6 volt rechargeable battery (will only power light in power outage - not camera), high impact durable housing, test switch and LED charge indicator. Wireless units must be hardwired into buildings electrical circuit. Specifications: • Image Sensor: 1/3" Sony CCD • Resolution: 420 Lines • Min. Illumination: .003 Lux (B/W) 0 Lux (Color) • Lens: 3.7mm Wide Angle • Power Required: 12 volts • Dimensions: 16” x 5” Includes: • Wireless cameras include FREE 2.4 GHz receiver (a $160.00 value) • All necessary power supplies and battery packs are included. • Black and white cameras feature .003 Lux which allows best possible images in almost complete darkness. Camera requires some ambient light (night light, television).