Specifications: Item type: Children Smart watch Color: Purple,Green Material:Silica gel Size:8.5x8.5x6 cm/3.35x3.35x2.36 inch. Chip: PDA8955. Battery capacity: 400mAh. Charging time: 2H. Display size: 1.44. Radiation: lower than mobile phones, international standards, no impact on the human body. Applicable age: 3-12 years old. Positioning method: precise positioning + base station positioning. Package included: 1 * Smart Watch 1 * USB Cable 1 * User Manual Note: 1. Please allow 1-3 cm difference due to manual measurement 2. Due to factors such as screen and shooting environment, the color may be a slightly different from the picture. Thanks for your understanding. Smart watch has a unique antenna design and multiple calibrations to ensure stable calls. The operation is simpler and the sound is clearer,support group chat on multiple mobile phones. Precise positioning: LBS base station positioning, Beidou positioning (no GPS positioning), long battery life Ultra thin body, super cool and wear resistant,eye protection color screen,the color of the call phone watchs whole machine is gorgeous and rich in texture Cleverly designed so that children have more fun and parents can monitor their children without notice. Tracker smart watch can accurately record every corner of the child, fully meet the needs of life and emergency positioning, and protect the safety of the child at all times