<p>[]Press the button and kinetic energy is converted into electrical energy. No need to worry about the battery running out of power</p> <p>[Distinguish front and rear doors] Press different buttons, and the receiver will emit different melodies. It is convenient to know which door has visitors </p> <p>[Brilliant Lights] Very eye-catching lights, very suitable for the elderly or deaf-mute people</p> <p>[150 meters open distance] The actual usage distance is suitable for most families</p> <p>[60 melodies]Rich melodies give the family a more beautiful environment</p> <p>[5 levels of volume] You can choose the appropriate volume according to your family's needs. High decibel volume will not miss visitors, low decibel volume will not disturb family members' rest</p> <p>[Free Pairing] buttons support up to 8, and there are no restrictions on receivers.</p> <p>[IP44 Waterproof]IP44 supports daily water splashing. If it needs to be placed outdoors, we recommend purchasing an additional professional doorbell waterproof cover, which will and longer to use.</p> <p>Specification</p> <p>Receiver size: 95 x 65mm</p> <p>Button size: 74 x 40mm</p> <p>Input: 50 \/ 60hz</p> <p>Volume: 0-110DB</p> <p>Melody: 60PCS</p> <p>Notice:</p> <p>1. The distance is an open distance. In actual use, the distance will be shortened due to the increase in obstacles.</p> <p>2. Although the frequency is 433MHZ, due to the incompatibility of the self-generating program, it cannot be used with other doorbells or other products.</p> <p>Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use.</p> <p>Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.</p> <p>Voltage: AC100-240V</p> <p>Colour:Black</p> <p>Material:Plastic</p> <p>Package Contents:</p> <p>1x button</p> <p>2x receiver</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>