TX-168 Rechargeable Car Alarm is a multi-functional anti-theft gadget for DC12 or 24V cigarette lighter socket. The detection area has a cone angle of 120° and the very loud alarm sound of 105 dB deters thieves. It has a panic alarm button and an additional external 105 dB siren in the engine compartment for even more attention. The TX-168 has two ports for charging external devices, one USB with a total output power of 5V/2.4A and one USB-C with a total output power of 5V/3.0A. You can charge the device's built-in 500mAh lithium polymer battery in about 2 hours in the cigarette lighter socket of your car/truck/car/boat or at the office/home via a micro USB cable (not included). The input voltage of the car alarm/siren is DC12 or 24V, the operating current of the siren is 100mA.