SpecificationMaterial: ABSColor: White+RedModel: NAS-RC03ZUS version:908.4MHzStandby current: 2uABattery: CR3032X3V (NOT INCLUDED)Battery life: 2 yearRadio Protocol: Z-WaveOperation temperature: 0-40℃Storage temperature: 0-60℃Wireless Range: 50metersWireless Distance: up to 60m outdoor, up to 30m indoorSize: (L)X(W)X(H) 45X52X15mm /2"X2"X1"(appr.) Features✔ SOS is used for emergency   ✔ Compatible with 300 series and 500 series✔ It is compatible with z-wave plus devices, battery powered, compact to carry   ✔ With 4 buttons, you can use remote control for emergency call and set 6 different scenes✔ Remote control/SOS is a  smart security device that can communication with other devices via z-wave   WARM TIPS:1.Our Sensors Compatible With following brand alarm horst:Fibaro/Smarthings/Vera/Zipato/Iris/Wink.2.Can't work alone.need work with their alarm host,Thanks. Package included 1 X SOS Z-Wave Sensor(Battery Not included)1 X English Manual Notice- Please allow slight dimension difference due to manual measurement.- Please consider the actual sizes in the listing as the pictures are generally enlarged to show detail.- Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully.- Due to the light and screen difference, the item's color may be slightly different from the pictures. Thanks for your understanding.