Features: 4G LTE +3G WCDMA+2G GSM, Waterproof IP67,GPS+Beidou positioning, accuracy up to 5 m WIFI positioning, accuracy up to 30m, Web platform/ Phone App for positions check Pill reminder and Pedometer, Fall detection with alert, SOS urgent call for help, Speed dial call Ring to find the device, Historical route display/Geo-fence Low battery/SIM card changing alert, Talking clock for real time voice telling Product specification: Model A:4G-FDD:Band 1/2/3/5/7/8/20 3G-WCDMA:Band 1/2/5/8 2G-GSM:Band 2/3/5/8 Model A applicable to Asia, Europe and Africa Model B: 4G-FDD:Band 1/2/4/5/7/12/13/17 3G-WCDMA:Band 1/2/5 2G-GSM:Band 2/5 Model B applicable to South America and North America GPS locating time:30sec with cold boot (open sky) 29sec with warm boot (open sky) 5sec with hot boot (open sky) GPS positioning accuracy:5-15m (open sky) WIFI positioning accuracy:15-100m(Under WIFI range) Working temperature:-20℃ ~ +70℃ Working humidity:5% ~ 95% RH Host size:57.5(L) x 40(W) x 16.5(H)mm Battery:1000mAh Color: As Shown Material: plastic Package Contents: 1 x GPS pendant 1 x Lanyard 1 x User manual 1 x Screw driver 1 x Magnetic USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.