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【Features and specifications】 ✅If multiple buttons are paired with one or more receivers in the same system, each button can be set to a different ringtone. ✅Power-off memory function: turn on the power again after power-off, no need to readjust and lock the ringtone. ✅The transmitter has no screw chuck design, waterproof and dustproof, and no rubber ring. ✅The transmitter uses 23A12V alkaline batteries (batteries not included). ✅Receiving distance: 300 meters in an open area. ✅The wireless signal will be affected by obstacles. The more obstacles, the more severe the signal loss. ✅The receiver has 5 levels (can be mute) 0-110db, 60 kinds of music to choose from. ✅Dimensions: transmitter 75x51x20mm, receiver 95x65x24mm. 【How to pair signals】 ✅Pairing method: press and hold the volume button on the receiver for about 5 seconds (the indicator light is on), release the volume button, and then immediately press the button, the signal is successfully paired. 【How to modify and lock music】 ✅Before plugging into a power outlet, press and hold the receiver's volume button. Plug in the power socket until the indicator light of the receiver lights up, release the volume button, press the music button to adjust to your favorite music ringtone, press and hold the volume button again until the indicator light turns on, immediately press the transmitter twice and the music is successfully locked. 【Package Content】 ✅1* Doorbell Launcher ✅1* doorbell receiver ✅1* battery ✅1* screw ✅1* double-sided tapeOnly the above package content, other products are not included. #wireless doorbell#Smart doorbell#doorbell#Door Bell#Waterproof doorbell##doorbellWireless#doorbellwifi#Wireless#Door#Doorbell#Door#Door#Doorbell#Waterproof doorbell #Wireless #bell#door#doorbell#doorbellwifi#doorbellwireless