UP-SENSE-3 Ubiquiti Multi-sensor, Bluetooth 5.0, Lithium Battery, (3-pack) UN3091 - Lithium METAL inside equiment Multi-sensor, Bluetooth 5.0, Lithium Battery, (3-pack)The UniFi Protect Smart Sensor is a battery-operated smart multi-sensor that detects motion and environmental conditions The Sensor transmits sensory data and alerts over Bluetooth to the UniFi Protect ecosystem.