Home House 4 Volume Wireless Doorbell Chime 2 Receiver + 1 Doorbell

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. Specification: Receiver: Working Voltage: AC 90~250V Power Consumption: 10mW Sensitivity: -110dbm Volume: 10-110db Working Frequency: 433.92Mhz280Khz Transmit Power: 0dbm Color: White Quantity: 2pcs Doorbells: Power Consumption: 0.01mW Modulation mode: ASK/OOK Battery: 12V/23V alkaline battery Working Frequency: 433.92Mhz280Khz Transmit Power: 0dbm Color: White Quantity: 1pcs Package Included: 1 x Receiver 2 x Doorbells 1 x User Manual 1 x Mounting Hardware Details Pictures: