1. KOLSOL TS61 TPMS Cigarette Lighter Plug, Provides 4 tires’ Real-time Pressure or Temperature Simultaneously, and provide visual warning light and audible alarm sound immediately when tire’s pressure or temperature thresholds are exceeded2. Improve fuel efficiency,increase tire life and traffic safety and avoid abnormal wear of vehicle parts. 3. LCD color screen displays pressure or temperature of 4 tires simultaneously.Pressure units: BAR/PSI.4. DIY products with external sensor, quick and easy to install5. Tire pressure sensors are designed with anti-theft, waterproof, and easy installation, includes special tools for installation and replace the sensor battery (CR1632). Tire pressure sensor is only 9 grams and the battery life can last up to 2 years, the battery (CR1632) can be replaced when the battery exhausted.