Features: The T18 Tire Pressure Monitoring (TPMS) ensures driving safety with real time 4 wheel monitoring using advanced sensors to detect abnormal tire pressure and prevent blowouts. Built with ABS+PC , this lightweight car tire monitor features low power consumption technology that extends battery life while reducing vehicle efficiency loss. Designed for conscious and family users, its tool installation process allows quick setup without professional assistance in under 5 minutes. Reliably operates in extreme temperatures ( 40°F to 185°F) during long commutes, highway drives, or winter road trips with weather resistant casing protecting internal components. Its activates audible/visual alerts for pressure deviations, providing critical for frequent travelers and commercial on terrains. Specifications: : The T18 automotive tire pressure monitor uses ABS+PC for durability and resistance. Parameters: Operating : 3.7 volts Operating temperature: -20°C-70°C Waterproof grade: IPX7free Pressure : 0-9.9 /0-144 /square inch Transmission frequency: 433.92 MHz Transmission power: greater than 10 milliwatts Charging : 5.1 volts Battery capacity: 2500 mAh Package Includes: T18-4 Tire Pressure Monitor note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.