Description :  RF-V20 Mini Portable 5V GPS Tracker Power Bank Collar Locator GSM GPRS Real Time Tracking Worldwide Location   Features :  Quad Band GSM & Global Positioning System Technique. Tracking Through Website \/ Mobile Apps \/ Wechat \/ SMS. Magnetic \/ Vibrative \/ Acoustic - Triple Security Alarm. Trajectory Playback \/ Galvanized Wire. One Month Standby Time. Power Bank \/ LED Flashlight. Voice Monitor. High Frequency Buzzer Alarm. Low Battery Alarm \/ SIM Card Changing Alarm.                         Specification :                Model:         RF-V20               GSM network:         850\/900\/1800\/1900MHz               GPRS standard:          Class 12、 TCP\/IP               GPS locating time:                     30sec with cold boot(under the open sky)               29sec with warm boot(under the open sky)               5sec with hot boot (under the open sky)               GPS Positioning accuracy:         10-15m(under the open sky)               Battery life:         4500mah               Battery type:         The built-in soft polymer lithium ion battery               Standby time         80 days               Working temperature:         -20\u2103 to +70\u2103               Working humidity:          5% ~ 95% RH               Host size:         122(L)x51(W) x25(H)mm110g               Packing size:         147(L)x95(W)x55(H)mm、 265g        Package includeds :   1 x RF-V20 Power Bank GPS Tracker 1 x USB Cable Line 1 x Magnetic Box 1 x Host Holder 1 x User Manual   Details pictures :