F. Stays on whenever the car is on 1. Rated operational voltage:DC 10V—16V 2. Rated total working current:DC 0.6A 3. Rated Total Power consumption:8.2W 4. Maximum operating voltage:DC 24V lasting for up to 1 hour 5. Excess working voltage:DC 18V lasting for up to 1 hour 6. Continuous operating time≥24hours,current fluctuation≤±2mA 7. Maximum surface temperature(shell)≤40℃(at ambient temperature of 20℃)