Welcome to our store！</br>1、Durable due to high and low temperature corrosion resistance, chemical resistance, IP47 level waterproof and other characteristics. 2、150 meters distance transmission, even across the wall, the signal is strong and steady. 3、Touch control bell button, there are 38 chord music ringtones and 8 levels volume can be selected, 120DB maximum volume. 4、No complicated installation process, and it is convenient to use, really suitable for home. 5、Adopting imported original ABS resin material, no pollution, can be recycled, environmental protection and harmless. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: Wireless Doorbell Material: ABS Power Supply Mode of Transmitter: One CR2032 Button Battery 100mAh(Built-in) Power Supply Mode of the Receiver: 3 x AA Batteries (Not Built-in) Transmission Distance: Approx.150m/164yd Ringtones: 38 Waterproof Rating: IP47 Volume Adjustable: 8 Levels How to Use: 1.The receiver is equipped with 3 x AA batteries(Not Built-in) 2.Press the music button and volume button on the receiver to change the music and adjust the volume 3.Press the touch button on the transmitter, the receiver can&nbsp;bell <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Transmitter (Built-in CR2032 Button Battery) 1 x Receiver (No Battery Included) 1 x Fixed Plate 1 x Install Screw Package 2 x Stickers 1 x Instruction Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>