Description:Featuring IP65 waterproof rating, this wireless doorbell can be used normally in rainy days and highly humid environments. You can install it conveniently by yourself with no wiring required, which is money-saving and labor-saving, free moving.This wireless doorbell is designed with built-in stereo speaker, which enables it to achieve clear sound to bring you excellent usage experience.Made of high-quality ABS material, it is lightweight and durable to use. Designed with self-powered outdoor unit, it doesn't need battery, which is more environmentally friendly.The length of the receiver is 6.7cm, the width is 5cm, and the height is 2.6cm. The length of the transmitter is 7cm, the width is 4.6cm, and the height is 2cm.It is suitable for office building, household, factories, tourism and other places, it has a wide range of uses. If paired with multiple push units in one system, the chime can be set individually for each push unit. It can automatically save selected ringtone after powering off. Eye-catching backlight flashes when someone pushed the doorbell, particularly suitable for the elder, deaf and pregnant women.Item Name: Wireless DoorbellMaterial: ABSColor: Black, WhiteReceiver Power: Plug InReceiver Operating Voltage: AC 100V-230V 50/60HzReceiver Operating Current: 60mAReceiver Static Current: 7mAReceiver Power: 0.25WReceiver Plug: US Plug, EU Plug, UK PlugReceiver Ambient Temperature: -10 degrees Celsius to +45 degrees CelsiusTransmitter Power Supply: Self-powered Transmitter Waterproof Rating: IP65Transmitter Ambient Temperature: -20 degrees Celsius to +60 degrees CelsiusWorking Distance: 150mFrequency: 433MHzMusic Tuning: 38 MusicSound Volume: 50db/1mVolume Adjustment: Level 4 (High, Medium, Low, Mute)Features: Self-powered, Waterproof, BacklightSize Details: Receiver: 6.7cm x 5cm x 2.6cm/2.64" x 1.97" x 1.02" (Approx.)Transmitter: 7cm x 4.6cm x 2cm/2.76" x 1.81" x 0.79" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Receiver1 x Transmitter 1 x User Manual