1. The left power light : the power is normal
2. The middle GPS light flashes: searching for GPS signals
3. The middle GPS light : GPS signal is normal
4. GSM light on the right: searching for GSM signal
5. The GSM on the right side : the GSM signal is normal and the card has been read

Specification:
1. Dimensions: 63 mm x 46 mm x 17 mm
2. Weight: 40 grams
3. Network: GSM/GPRS
4. Network frequency band: 850/900/1800/1900Mhz
5. Chip: UBLOX
6. GPS sensitivity: -159dBm
7. GPS accuracy: 5 meters
8. Battery: 200 mAh
9. Note: only vehicle tracker, no SIM card

Functional advantages:
1. Add shift alarm and alarm in electronic fence area
2. Add smart power saving mode
4. Add oil and power failure, ACC status notification function, low power/power failure alarm
5. Blind zone supplementary transmission function, when there is no mobile phone signal, the data is saved in GPS, and will be supplemented when there is a signal
6. AGPS function, fast satellite positioning
7. Double positioning, accurate and more secure
8. Historical records, one-click query
9. Can recall the driving track within 180 days