AC 90-250V Smart Indoor Doorbell Chime Wireless WiFi Door Bell App Control For M3 Protocol 433

AC90-250V Smart Indoor Doorbell Chime Wireless WiFi Door Bell App Control for M3 Protocol 433 Specifications: Receiver: Working Voltage: AC 90~250V Power Consumption: 10mW Sensitivity: -120dbm Volume: 10-120db Working Frequency: 433.92Mhz±280Khz Transmit Power: 0dbm Color:White Quantity:1pcs Doorbells: Power Consumption: ≤0.01mW Battery:12V/23V alkaline battery Working Frequency: 433.92Mhz±280Khz Transmit Power: 0dbm Features: -Wireless door bell -With alarm function -Waterproof -Stylish look and light touch design. -Easy to install. -Ultra-low power design, power saving and long-lasting use. -52 polyphonic ringtones. -4-level optional volume adjustment. -900ft maxium wireless range in the open air. -Push buttons max.16 Pictutres: Please noted: please use 23A 12V battery. Shipping & Packing: 1.Please double check your address before completing the payment.If you want to make any change ,please kindly contact us asap, or we will send the goods to the address you left on the order information only. 2.A tracking number will be updated on Ali-express once your item is shipped. 3. Can not specify the POST, we will choose the best way for you. Certificate: AC90-250V Smart Indoor Doorbell Chime Wireless WiFi Door Bell App Control for M3 Protocol 433