Remote operation: You can control the locator by SMS to perform and stop recording, positioning and other tasks. Remote location query and online tracking: supports remote query of the current target location and real-time tracking. Expansion TF card: Support expansion of TF card and remote clearing of TF card memory. Remote inquiry of locator status: it supports remote inquiry of whether all functions of the host are turned on or off, battery capacity, binding number, signal strength, startup frequency, GPRS, TF card capacity, etc. Remote recording: Support the remote recording function of the locator. Specifications: Product: GF-07 positioner Color: black Material: plastic Battery capacity:3.7 V 400 mah Li - ion Standby time:12 days Working time:4 to 6 days Talk time:150-180 minutes Format:GSM/GPRS GPRS:Upload60, TCP/IP GSM positioning time: 25 seconds Other parameters: Talking current: 150mA Standby current: 2.5mA Operating voltage: 3.4 4.2V DC Open voice control current: 30mA The expansion card:Mini TF card Working temperature:- 20 C to 55 C Appearance size: 3.5 x 2.0 x 1.4 cm (L x W x H) Basic parameters: spectrum GSM850/900/1800/1900 MHZ Supported countries: China Britain France Germany Netherlands Italy Brazil, Portugal, Denmark Russia Turkey Hungary Thailand Indonesia Vietnam myanmar Pakistan, Iraq, Arabia, Greece the kazakhstan Mongolia dubai, etc... Package Contents: 2 x GPS Locator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.