Long Range Wireless Doorbell Plug Loudspeaker Home Entry Alarm Waterproof Door Bell Night Light 48 Ringtone|Doorbells(white) FEATURES: - IP54 waterproof, low temperature resistance, suitable expose to outdoor rain and snow weather. - Receiver Door bell button batteries life span is 6~10 years and rarely for batteries replacement. - Advanced wireless technology, long distance transmission, suitable for grand houses or heavy duty anti-thief doors. - 48 Ringtones, also can used as a night light. - Long range transmission: open space about 400m, 20-80m indoor with obstacles. DESCRIPTIONS: Doorbell Volume: 85-97dB Receiver: Operating Voltage: AC 80-275V Operating temperature: -20~70 Doorbell Button: Battery Type: CR2032(included) Operating temperature: -40~70