Essential detailsModel Number:TR40Screen Resolution:854x480Screen:< 2"Display Color:Black / WhiteFeature:3G, wifi, 4g, APP Control, IP67 waterproof, IP68 waterproofOperation System:ANDROID, house arrestBand Material:TPUCase Material:ABS+TPUFunction:Power Reserve, Remote Control, Call Reminder, Answer Call, ankle monitorScreen Size:28mmMain Chip:SL8521E(1.3GHZ)Network:2G/3G/4GPositioning mode:GPS/Wifi/LBSWaterproof:IP67/IP68Tracker Battery Capacity:4000 mAhPower bank capacity:5000 mAhOS:Android 4.4house arrest:Supportedgeofence:Supportedkey lock:SupportedAdvantage1. Being suitable for Global 4G network in worldwide.2. Supporting GPS, AGPS, LBS and Wifi for outdoor and indoor precise tracking.3. Supporting alert of tampeproof, geofence, offline and low battery.4. IP67 / IP68 waterproof for swimming and taking shower with room temperature water.