Car GF07 Mini GPS Tracker

Appearance size: 3.5cm*2.0cm*1.4cm (l*w*h) charge output: 300-500ma outputdc5.0v standby time: 12 days. working time 4-6 days network system: gsm/gprs working voltage: 3.4 - dc 4.2v basic parameters: band gsm850/900/1800/1900mhz often encounter problems: a: you must insert the sim phone card after the boot will enable mobile phone signal, so 2 tf memory card can not be stored? 3 what is the main control cell phone? special warning: when the alarm locator (power in 5%) please charge, such as battery the battery is not in use, the battery charge to 60%- 80%, the battery charge to, and long time no (three months).