Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. Wireless Doorbell, Home Intelligent Reception, Home Sensor, Remote Control Caller Features: It can be wirelessly connected, with five adjustable volumes and adjustable sounds as needed. LED flashing reminder with strong penetration. The transmitter uses batteries, and the receiver has been put into use. This is the doorbell and also a pager: elderly people, children, and pregnant women all have needs, so you can ring the doorbell to notify them when there is a situation at night. One click call, no additional operation required. Strong penetration: Strong penetration, received at a distance of 150 meters from the ground. It can mute with one click to avoid interference. The USB connector can rotate up and down, suitable for multiple angles. There are 60 options for music ringtones: the door ringtone is not a "ding dong" sound, and can also achieve free switching of 60 chords, with a melodious sound quality. Press the doorbell button and the receiver will sound and flash. Multiple combinations allow the host to work together with multiple calling machines without noise, effectively avoiding the trouble caused by interference between neighbors. Product Description: Material: ABS Receiver: 5.6 * 5.6 * 1.6cm Emitter:6.5 * 3.7 * 1.1cm Receiving distance: 150 meters Volume adjustment: 5th gear Internal ringtones: 60 types Transmitter battery: 2032 battery Receiver: plug in the power supply for use (AC110V/220V) Product contain:1x button, 1x bell, 1x manual Features: It can be wirelessly connected, with five adjustable volumes and adjustable sounds as needed. LED flashing reminder with strong penetration. The transmitter uses batteries, and the receiver has been put into use. This is the doorbell and also a pager: elderly people, children, and pregnant women all have needs, so you can ring the doorbell to notify them when there is a situation at night. One click call, no additional operation required. Strong penetration: Strong penetration, received at a distance of 150 meters from the ground. It can mute with one click to avoid interference. The USB connector can rotate up and down, suitable for multiple angles. There are 60 options for music ringtones: the door ringtone is not a "ding dong" sound, and can also achieve free switching of 60 chords, with a melodious sound quality. Press the doorbell button and the receiver will sound and flash.