Information: 15 phone book whitelist, saved phone numbers can call the watch The watch supports pedometer, sleep, sedentary reminder and health management. Support track positioning, support electronic fence, support SOS one-key distress, and send information to platform management system (-up alert box), while automatically calling emergency contacts. Support heart rate measurement, blood pressure. Body temperature measurement Product Features: Support GPS + LBS + WIFI multiple positioning. Waterproof level: IP67 Battery capacity: 850mAH Standby time: 7-9 days Talking time: 6-7 hours Support network: GSM: B2 B3 B5 B8 TDD-LTE: B1 B3 B5 B8 FDD-LTE: B38 B39 B40 B41 APP terminal (IOS+Android): Calling: support two-way call and block other harassing calls Micro-chat function: voice two-way group micro-chat function Remote monitoring: support callback mode remote monitoring (through the high anti-noise microphone can clearly hear the other party's environmental sound remotely) Electronic fence: multiple electronic fences can be set History track query: can query the history track within time range WIFI positioning + GPS positioning + base station assisted positioning wifi positioning accuracy 3-50 meters, GPS positioning accuracy can reach 3-10 meters, LBS accuracy can reach 100-500 meters range Network automatic time calibration for the watch: the watch is automatically synchronized with time after binding. Color: Black Material: plastic Package Contents: 3 x Elderly GPS Tracker Watch 3 x 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.