Fukang wireless doorbell function: 1. With pure high-precision electronic materials, combined with Fukang's unique long-distance technology, the wireless distance of the product can reach 300 meters under the same power consumption. 2. Use high-quality speakers to make the doorbell output pure music and high decibels. 3. Using a stable music chip and loading 52 polyphonic ringtones, the doorbell sounds rich and pleasant. 4. Adopting European and American design style, stylish and elegant appearance, simple, let the doorbell embellish the beauty of the family. 6. Humanized four-level volume adjustment to meet the needs of different environments and different sound levels. 7. Digital double panel circuit design, stable work, strong and reliable performance. 9. Humanized design, the factory includes the installation of 3M adhesive stickers and expansion screws, which can be installed by yourself without any need for help from professionals. 10. The transmitter button has a long life design. It can be pressed 5 times a day on average and can be used continuously for 15 years. Fukang wireless doorbell product specifications: Host supporting use: transmitter + receiver [quantity can be freely matched] Transmitter working voltage: 3.7V Transmitter low power consumption: 10mw Receiver working voltage: AC: 90-260V 50Hz Receiver power consumption: 0.5W Adjustable volume range: 25 to 100dB Working frequency: 433MHz Transmitter battery: 150mAh polymer lithium battery (solar charging) Fukang wireless doorbell installation method: 1. Take out the indoor unit from the package and connect the indoor unit to a voltage between 90-260V; press the ringtone switch button and adjust the volume as you like. 2. Select the location of the outdoor unit for installation Installation method Double-sided adhesive paste Screw fix