Description: Type: Mini Tracker Working Time: 4-6 days Battery: 3.7V 400mA Li-ion Battery Charging Input: AC 110-220V 50/60HZ Standby Current: About 2.5mA Charging Output: DC 5V 500mA Standby Time: 12 days GPS Positioning Accuracy: About 100m Antenna Type: GSM/GPRS Material: ABS Communication Frequency: 850/900/1800/1900Mhz Working Voltage: DC 3.4-4.2V Talking Current: About 150mA Size: 35*20*14mm Package Contents: 1 x Mini Tracker 1 x USB Cable 1 x User Manual Note: The color deviation might differ due to different monitor settings. We provide you with the best product and service. If you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much. Instructions 1. Prepare a SIM card and a memory card. 2. Insert the SIM card into the card machine cover according to the indicated direction. The product will automatically start, the red light will flash 4 times, and then enter the standby state after 30 seconds. Note: If you do not read the memory card, please insert it again. 3. Edit the master number: edit SMS 000, receive (set, bind + master number) 4. Separate recordings: edit SMS 555, receive (set, recording starts) 5. Restart the host, edit the message 999 and wait a minute to restore 6. Host status, edit SMS 888, receive (all host status, on or off, battery capacity, binding number, signal strength, boot frequency, GPRS, TF capacity) 7. Shut down: edit SMS 444 Receive (reset, task canceled)