Item Type: Alert System <br>Material: ABS <br>Wireless Receviing Distance: Approx. 330m / 1082.7ft (Open Area) <br>Wireless Frequency: 433MHZ <br>Method: 1 to 1 <br>Built in Battery of Remote Control: 1 x 23A, 60mAh Alkaline Battery <br>Voltage: 100-240V1、Main Application: The alarm system is applicable to patients, elderly people, pregnant women, children calling for help at home. There is no need to shout to get attention. <br>2、Powerful Function: The signal can be received within 330 meters of the open space, and the signal can pass through the wall. <br>3、IP55 Waterproof: This call button is IP55 waterproof and can be installed in the washroom, very practical! <br>4、Music, Volume Adjustable: There are 38 songs, and 4 level volume adjustable, you can make adjustments as needed. <br>5、Easy Carrying: Comes with small size and lightweight, you can easily take this button with you to help with your daily life.<p>1 x Alert System</p><p>1 x Button</p><p>1 x Manual</p>