Features:1. Compact installation does not take up space2. High-efficiency solar panels, super endurance3. Support tire position interchange4. Long receiving distance, stable signal5. You can place spices into the base6. Automatic sleep makes it easier to boot7. Large volume alarm toneSpecification:TPMS Specification:Working voltage: 3.7-5VStorage temperature: -30-90 CelsiusWorking temperature: -30-85 CelsiusRF transmission frequency: 433.92MHz 50KHzRF signal receiving sensitivity: -90dbmDisplay: LCDBright screen working current: 6mABlack screen working current: 4mASize: 85*95MMBattery: 400 mAh (built-in)External sensor parameters:Working voltage: 2.1-3.6VStorage temperature: -30-90 CelsiusWorking temperature: -30-85 CelsiusTemperature resolution: 2 Celsius (25 Celsius)Pressure range: 0-6.0BarPressure resolution: 0.1BarWaterproof rating: IP67Transmitting power: 10dBmTransmission frequency: 433.92MHzSize: 21mm (diameter) * 17mm (height)Battery: CR1632 (built-in)Material:includes:1 x Car TPMS(Built-in Battery)1 x Bracket4 x Sensors (External)1 x USB Cable1 Set x Installation tool(Adhesive Tape, Wrench, Screws)