Details:Product Type: Wireless Door BellWeight: 225gSize: 110*75*180 mmFrequency: 433MHz±0.5MHzActive pressure wave(receiver): ≤-57dbmNegative pressure wave(transmitter): ≤-36dbmPower supply(receiver): AC 110/240VPower supply(transmitter): 1X12V 23A (ALKALINE BATTERY)Working power consumption: ≤ 5WTransmit power: Operating range: 120 METERS(OPEN AREA)Sound options: 32 chimes,36 Polyphonic melodiesPackage: 1* receiver,1*doorbell, 1* adhesive strip, 1* screwdriver, 2* screws How to mount the doorbell: The doorbell is mounted by simply sticking it to a wall using the included adhesive strip.1. Peel off one side of the adhesive strip and attach it to the rear of the backing plate, ensuring none of it is visible from the front.2.Find the area you want to mount the doorbell. Flat, smooth surfaces are good choice. Make sure they are clean and dry before mounting.3.Peel off the other side of the adhesive strip and attach the doorbell to the mounting surface. How to set the volume and chime:1.Press the volume button to change the volume, 4 levels of adjustable sound volume are offered and changed from high level to low level circularly.2.To change chimes, press the Chime button to move to the next chime. A chime will play each time you press the chime button. You do not need to confirm your selection. The chime playing is the chime selected and the one which will be heard when the doorbell is pressed. 36 chimes can be changed in order circularly.
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