Product Features: Base station positioning Card-operable two-way call Phone book (APP address book 10 is a single call, phone 10 is a two-way call) SOS emergency alarm, remote shutdown, safe area, low battery alarm, voice monitoring, historical track, voice intercom, love reward, watch alarm Product parameters: Card specifications: Standard Micro SIM card (supports mobile Unicom card, to open 2G network data traffic) Card specifications: install a standard micro SIM card Display: 1.44 color with backlight protection screen Resolution: 128*128 Battery capacity: 400MAH, gel polymer battery, non-removable Charging time: 1.5 hours Standby time: 1-2 days Hardware platform: MTK  RDA8955 Software platform: MTK comes with system Positioning: LBS base station positioning(no GPS positioning) Communication module: GSM850/900/1800/1900MHZ Radiation: lower than mobile phones, international standards, no impact on the human body Strap: Silicone Watch case: ABS Color box size: 8.6*8.6*6.3cm Package weight: 117g Specifications: Cleverly designed so that children have more fun and parents can monitor their children without notice. SOS Call,Remote monitoring Voice micro chat Low radiation Eye protection color screen LBS base station positioning (no GPS positioning) Package Included: 1*Smart Watch 1*USB Cable 1*User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.