4G high-speed network, worry-free connection Built-in 4G communication module fully supports China Mobile, China Unicom and China Telecom networks, with stable signal and fast network speed. When your child is on campus, in the park, or at the mall or in the countryside, you can keep real-time and clear calls with your parents, with no delay and no lag in voice communication. Whether it is to share interesting campus events, or to ask for help in an emergency, one key dialling, the warmth of the parent's response instantly arrives, truly realising the close companionship of far-flung realms as far away as the heartland. Precise positioning, safety as a shadow Equipped with a high-precision GPS chip, combined with BeiDou, base station, Wi-Fi, acceleration sensors and other multiple positioning technologies, the positioning accuracy can be up to 5 metres or less, locking the child's location in real time. Parents can check the specific location of the child at any time through the mobile phone APP, as if having a pair of clairvoyance. In addition, it supports indoor positioning in more than 4000 large shopping malls, high-speed railway stations, airports, etc., accurate to the vicinity of the shop, without fear of indoor signal blocking, and the child can be accurately guarded even in complex places. At the same time, the app can record your child's movements within 3 days, so that you can see your child's itinerary at a glance and give your parents more peace of mind. Convenient call, parent-child communication High-definition sound quality, restore every detail of the voice, so that children and parents can talk as if they were face-to-face. The watch supports two-way communication, parents can take the initiative to call their children, and children can also call back when they encounter problems. In times of emergency, you can also set up a one-button SOS function, long-press the button for 3 seconds, and it will automatically make a phone call to the preset 3 emergency contacts and send the location information, so that you can guard your child's safety in a race against time. In addition, the family group chat function facilitates real-time voice and text chat between family members and children, so that the whole family can witness the child's growth together.