1. Material: ABS resin 2. Dimensions: receiver 9.5x6.5x3 cm, transmitter 8x4.5x2 cm 3. Weight: about 40 grams 4. Working distance: about 100 meters 5. Waterproof: IP44 6. Power supply mode: transmitter contains 23A 12V battery, receiver 2 x AA batteries (need to purchase by yourself) 7. Applicable scenarios: family residences, office buildings, hospitals, restaurants, etc. 8. Features: good signal, strong penetrating power, no wiring required, easy installation, flashing lights for incoming bell, durable
