Description: This wireless doorbell can be used normally in rainy days and highly humid environments because of its IP65 waterproof rating. You can install it conveniently by yourself without wiring, which is money-saving, labor-saving and free moving. There are many appealing features of this wireless doorbell including self-powered outdoor unit, slim and mini design, beautiful appearance, eye-catching backlight, chime individual setting, ringtone memory function, electric reduction voltage, stereo speakers and so on. Made of high-quality ABS material, it is lightweight and durable to use. 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. Item Name: Wireless Doorbell Material: ABS Color: Black, White Receiver Power: Plug In Receiver Operating Voltage: AC 100V-230V 50/60Hz Receiver Operating Current: ≤60mA Receiver Static Current: ≤7mA Receiver Power: 0.25W Receiver Plug: US Plug, EU Plug, UK Plug Receiver Ambient Temperature: -10 degrees Celsius to +45 degrees Celsius Transmitter Power Supply: Self-powered Transmitter Waterproof Rating: IP65 Transmitter Ambient Temperature: -20 degrees Celsius to +60 degrees Celsius Working Distance: 150m Frequency: 433MHz Music Tuning: 38 Music Sound Volume: ≥50db/1m Volume Adjustment: Level 4 (High, Medium, Low, Mute) Features: Self-powered, Waterproof, Backlight Size 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: 2 x Receiver 1 x Transmitter 1 x User Manual