【Easy and Convenient to Use】 Just clip the transmitter along the edge of the underpants, then it will monitor kids' pee status and send alarm information to the receiver wirelessly, easy and convenient to use. 【3 Reminding Modes】 Supports 3 reminding modes, you can chose vibration, sound or sound ' vibration reminding way to alert you to wake your kid up and guide her/him to toilet. A very reliable bedwetting alarm for kids potty training. 【Supports Timer Function】 Featuring 30min/60min/90min/2H timer reminding function, this bedwetting alarm is more helpful for keeping babies stay away from butt skin diseases, solving bedwetting problem of little children, and more convenient to take good care of elders with special diseases. 【Built-in Rechargeable Battery】 The transmitter and receiver both have built-in rechargeable lithium battery, and can be charged by the included USB charging cable. 5V 1A charging voltage and magnetic charging port design make it convenient to be charged by power bank, laptop, car charger or USB power adapter. Specifications: Color: White Charging Voltage: 5V 1A Charging Time: 2H ' Effective Range: 40M(straight-line distance ), 10M(through-wall distance ) Transmitter Battery: 55mAh Receiver Battery: 300mAh Transmitter Size: 5.3 * 3 * 1.5cm/ 2.1 * 1.2 * 0.6in Transmitter Weight: 10g/ 0.4oz Receiver Size: 4.5 * 5.5 * 1.5cm/ 1.8 * 2.2 * 0.6in Receiver Weight: 25g/ 0.9oz Packing List: 1 * Transmitter 1 * Receiver 1 * USB Charging Cable 1 * Users Manual(English)