Wireless Waterproof Emergency Fall Detect Alarm Wristband Sos Button. FEATURES: EM-70 Wireless Wristband Waterproof Panic Button is a Very Useful Device for Asking for Help Under Unexpected Incidents. It is Very Easy to Use By Wireless Communication to the Alarm Panel. Push It then the Panic Button Will Send a Signal to the Alarm Panel. The Button Needs a Press for 3 Seconds to Make It Work, Not Press a Short Time. Waterproof Design Ensures Users Can Wear It when Taking Shower. Long-life Battery. Unique Comfortable Design. SPECIFICATIONS: Model Number: EM-70 Name: SOS Help Button Arming Type: SMS Signal Wireless Frequency: 433.92 MHZ Working Voltage: 3V Battery IP Class: IP66 Transmission Range: 30~100m in Open Air Wristband: 19cm (7.5inch) Note: ThisSOS Button Can Not Workindependently, It Need Connect with the Alarm Panel.. Your order will be shipped from abroad so please allow the necessary time of at least 14 work days for delivery due to ongoing delays in postal deliveries globally.