Wireless Doorbell Self-Powered Doorbell Button Kit 4-Speed Adjustable Volume with LED Flash 30 Chime Up to 656ft Range for Home Office Classroom Waterproof Plug and Play Wireless Doorbell Chime Features: 【Wireless Doorbell for Easy Installation】: Say goodbye to complex wiring and battery replacement with our self-powered wireless doorbell. Simply plug it in and enjoy the convenience of an instant connection. The innovative design allows for easy installation in any location, whether indoors or outdoors. 【Customizable Sound and Volume】: With 30 different ringtone options, you can personalize your wireless doorbell to suit your preferences. Adjust the volume to your desired level, ensuring that you never miss a visitor again. 【Long Range and Reliable Signal】: Experience the freedom of a 200m/656ft signal range with our wireless doorbell. Whether you're in the backyard or on a different floor, rest assured that you will always hear the doorbell ringer. Even with obstacles in the way, the signal remains strong, providing consistent performance. 【Durable and Weatherproof Design】: Our wireless doorbell is built to withstand various weather conditions, making it perfect for outdoor use. The dust and waterproof design ensures reliable operation, rain or shine. Whether it's scorching hot or freezing cold, this doorbell will continue to function flawlessly. 【Ideal for Everyone】: Designed with the needs of the elderly and those with hearing impairments in mind, our wireless doorbell features a high-volume output of up to 90dB. This ensures that even individuals with limited hearing can easily hear when someone is at the door. Additionally, the LED flash feature provides a visual alert for added convenience. Specifications: Doorbell Button Power Supply Method: Self-generating Signal Distance (without barriers): 200m (656ft) Signal Distance (with spacing): 50-70m (164-230ft) RF Frequency: 433MHZ Operating Temperature: -20 ℃~+60 ℃ Size: 4.2 * 2.1 * 8.1cm/1.7 * 0.8 * 3.2inch Item Weight: 65g/2.3oz Doorbell Receiver Voltage: AC100V-230V50/60Hz Power Consumption: 0.25W Number of Ringtones: 38 Receiving Distance (without barriers): 200m (656ft) Receiving Distance (with spacing): 50-70m (164-230ft) Sound Decibel: ≥ 80dB/1m (3.3ft) Operating Temperature: -10 ℃~+45 ℃ Product Material: Flame retardant PC Power Supply Plug: US Plug, UK Plug, EU Plug (optional) Size: 8.5 * 5.1 * 2.1cm/3.3 * 2.1 * 0.8inch Item Weight: 150g/5.3oz Note: Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Packing List: 1 x Doorbell Receiver 1 x Doorbell Button 1 x Screw Pack 1 x Instructions 1 x Adhesive Tape