1. This product is mainly used to prevent tracking and positioning, to protect your personal privacy and whereabouts 2. This product is equipped with an automotive OBD interface power supply line, in the vehicle flame state OBD interface constant power, sustainable guarantee product using automotive battery power supply. 3. This product has a built-in 6000MA lithium battery, 12V3A power supply, sufficient power takes three to four hours, and the built-in battery can be used for about one hour. (If you need to extend the battery life, you can buy an external 12V lithium battery) 4. 1 No. Switch independent control GPS+BeiDou(When No.1 switch is on, only the key is on, and the work indicator is off). 5. Switch No. 2 controls 900MHz+1800MHZ+2400MHz+2600MHz (In particular, switch No. 2 can start work only after switch No. 1 is opened, and the work indicator {red light} is on). 6. Charging using DC-12V fast charge mode (30 minutes can be full 50%, three to four hours can be fully charged), can use the vehicle OBD interface and vehicle cigarette lighter interface power supply, convenient and convenient。 7. Working channel: 2G/4G: 900MHz 30db 4G: 2600MHz 30db GPS: 1500MHz 2G/4G: 1800MHZ Big Dipper: 1200MHz WiFi: 2400MHz 8. Product size: 86 x 50 x 185mm 9. Weight: 700G 10. Effective coverage: 1-10m