Information: 15 phone book whitelist, stored telephone numbers can name the watch The watch supports pedometer, sleep, sedentary reminder and health management. Support track positioning, assist digital fence, assist SOS one-key distress, and deliver news to platform leadership elements (pop-up alert box), while routinely calling emergency contacts. Support heart fee measurement, blood pressure. Body temperature size Product Features: Support GPS + LBS + WIFI several 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: assist two-way name and block different harassing calls Micro-chat function: voice two-way group micro-chat operate Remote monitoring: assist callback mode remote monitoring (through the immoderate anti-noise microphone can clearly listen the choice party's environmental sound remotely) Electronic fence: multiple digital fences can be set History track query: can question the history song inside 1 month time fluctuate WIFI positioning + GPS positioning + base station assisted positioning wifi positioning accuracy 3-50 meters, GPS positioning accuracy can attain 3-10 meters, LBS accuracy can reach 100-500 meters vary Network computerized time calibration for the watch: the watch is automatically synchronized with the community time after binding. Color: Black Material: plastic Package Contents: 1 x Elderly GPS Tracker Watch 1 x USB Cable Only the above package content, diversified merchandise are usually not included. Note: Light reflection and diversified exhibits can cause the colour of the article within the picture slightly diverse from the real thing. The size allowed error is +/- 1-3cm.