1. Material: The car air vent watch is crafted from quality ABS, ensuring durability, fine craftsmanship, and a sturdy build that resists damage, offering a long service life. 2. 2in1 Design: This electronic car thermometer clock combines a clock and temperature display in one. On the right side, there's an A/B button for setting the time and adjusting values. The side features a battery compartment requiring 2 button batteries for power (included). 3. Easy Installation: The car electronic watch strap's air vent clip requires no tools—simply attach it directly to the vent with a secure grip, ensuring it stays firmly in place for hassle use. 4. Night Light Function: The LCD display features a night light for clear visibility. Press and hold for 8 seconds to activate energysaving blue light mode, lasting 30 minutes. Press the switch to turn off the blue light.