Smart Self-powered Wireless Doorbell 4-Gear Volume Waterproof Door Bell,2 Receiver + 1 Button (CE is applying) - White •[No data cable required,making your home tidier] Type-C 5V/1A input,can be placed on the desktop,hung on the wall,or combined with C series switches or sockets,no data cable required •[No batteries required] Using self-generating technology,with the touch of a finger,kinetic energy is converted into electrical energy and wireless signals are instantly transmitted,so you no longer have to worry about changing the battery for the doorbell. It can also reduce battery pollution to the environment •[Long distance,high penetration] Wireless transmission is far away,the distance in the open space can reach 150 meters,the coverage is wide,the penetration is strong,and it is stress-free to use through walls •[Multiple Music] Say goodbye to the "ding-dong" sound of the traditional doorbell. There are 58 kinds of music for you to choose from,which are vivid and pleasant. There is always one that suits you and creates more joy in your life •[Multiple collocations] One button can match 10 receivers,supports a variety of collocations,and is suitable for various house types. •[Different ringtones to distinguish different doors] When multiple buttons are paired with one receiver,different music can be set for different buttons. Different ringtones can be set for the front and rear doors for easy differentiation and the wrong door will not be opened •[Four Modes] The doorbell has 4 modes: ringtone + light(flashing),only ringtone(no light),only light(no ringtone),ringtone + light(always bright). Meet any of your needs. For example: a deaf elderly person can tell whether someone is visiting by turning on a light •[Volume adjustment] 4 levels of volume,freely adjustable. For example,if you have a busy week and want to have an uninterrupted weekend,you can turn the volume down to the lowest level to protect your tranquility •[No cross-ringing] Using intelligent learning code technology,there will be no cross-ringing when used in any combination,and it will not interfere with neighbor's doorbells •[Smart Memory] Restart after power outage to retain the setting memory without resetting •[Waterproof and dustproof] Support IP44 level protection. Can be used both indoors and outdoors •Specification: •Type-C input: 5V/1A •Working temperature: -20℃ to 60℃ •Frequency: 433.92MHz •Distance: 150m (in open area) •Power: 0.5W •Working humidity: ≤85%RH •Volume: 0dB~110dB •Material: PC+ABS •Button size: 6.8*4.2*2.5cm •Receiver size: 4.2*7.3*2.3cm •Note: •Wireless signals are affected by the environment. The more obstacles there are,the more serious the signal loss will be and the shorter the distance will be. •The button cannot be placed on the iron door,otherwise the signal will be blocked. It is recommended to place the button next to the iron door. •The receiver cannot be placed next to wireless signal equipment such as microwave ovens and radios to avoid signal interference. •For outdoor use,it is recommended to use it with a waterproof cover (not included). If you need a waterproof cover,please contact customer service. Package included: •2 x Receiver •1 x Button •2 x 0.5m Cables •1 x Installation Screws Kit •1 x English User Manual •Other things not included