Type:GPS Tracking GSM/GPRS:850/900/1800/1900 Battery:400mAh Stand by time:3-5days Recharge time:2-3 hours Net weight:20.6g Customization:support compatible system:Android 3.1 or above, Ios 8.0 or above Device Dimension:43*36*16mm Type:Pet Collars & Leashes Feature:Eco-Friendly, Stocked Show More