C302B One to One Home Wireless Doorbell Temperature Digital Display Remote Control Elderly Pager Features 1. Self-generated power design, easy to use 2. Strong penetration ability, meeting household needs 3. 38 chords can be switched freely, and the ringtones are pleasant to the ear. 4. Adopt waterproof design, no fear of rain damage, safe and durable 5. The receiver has the function of synchronously detecting the ambient temperature and intuitively understands temperature changes. 6. Supports four-level volume adjustment, which can be heard in the kitchen or balcony, making it convenient for the elderly to use. 7. Installed in the elderly room, it can be turned into a pager instantly to detect problems in time and avoid potential safety hazards. Parameters 1. Shell material: ABS plastic 2. Wireless frequency: 433MHz 3. Working temperature: -10 degrees Celsius to 50 degrees Celsius 4. Working voltage: 100-240V 50-60Hz 5. Working current: less than 100mA 6. Volume: about 50dB, 4 levels adjustable 7. Standby power consumption: 0.25W 8. Wireless distance: 150M (no interference in open space) 9. Receiver size: 85x52x43~63mm 10. Transmitter size: 67x33x18mm