Ankle Bracelet GPS Tracker/GPS Tracker Bracelets

GPS+GSM+GPRS wireless network GSM 850/900/1800/1900 MHz Built-in high sensitive MTK GPS chip group Built-in GPS&GSM antenna Send location to platform by adjustable time Inbuilt battery 450mah battery 50H working time, 160H for standby Voice Monitor function Two-way communication function Phone call avaliable - 2 family numbers supported SOS emergency alarm Geo-fence alarming function Waterproof