Large battery Detachable 4G kids GPS tracker watch with video call voice chat safety zone setup for fitness tracking D52. Detachable Structure Design: Watch strap and case are detachable with silicone holder for pendant or wearable options. Comprehensive Safety Features: Includes GPS+LBS+WiFi positioning, Geo-fence, SOS button, and remote monitoring capabilities. Free Cloud Service: Lifetime free access to Beesure GPS app and AWS Cloud server platform with no ads. Long Battery Life: 730mAh Class A battery provides 2-3 working days with 3-4 hours charging time. IP67 Waterproof Rating: Durable IP67 waterproof design suitable for daily wear and outdoor activities. OEM Service Available: Free OEM software logo, laser engraving, and packaging with MOQ of 1000 pcs. 1-Year Warranty: One-year warranty coverage for mechanical defects excluding artificial damage.