The LevNet RF™ 902 MHz PIR surface mount occupancy sensor (WSC12) has built-in solar cells that draw on available ambient light to power themselves and can operate for up to 80 hr in total darkness. Batteries are not required. For improved detection, the sensor uses an enhanced PIR element located directly behind a unique multi-zone optical lens. This exclusive fresnel lens establishes twice as many zones of detection as traditional sensors. The self-powered wireless sensor design also overcomes the placement and coverage challenges of traditional sensors. Self-powered wireless sensors enable flexible placement, allowing sensors to be mounted where needed without the complexity of moving or installing new wiring.