KUNFINE USB Android TPMS Tire Preure Monitoring System Display Alarm System 5V Android Navigation Car Radio With 4 Sensors Main Features: -Solar power charging, LCD color displaying, adjustable brightne -Rear-time monitoring the preure & temperature -Low air preure/high temperature warning -Set up sensor: learn new sensor ID code when replace sensor Sensor Specification: Operating frequency: 433.92Mhz Working temperature: -40 -120 Humidity: 0% to 100% Battery life: External sensor> 2 years/ 30,000 km Working preure: 0 – 99Psi Alarm preure: >46.5Psi or Preure accuracy: 1.5Psi Working voltage: 2.1-3.6V Waterproof: Ip67 Whether can change battery external sensor can change batteryInternal sensor can't change battery Monitor Specification: Solar power charging LCD displaying Adhere to windscreen for installation Operating frequency: 433.92Mhz 50KHz Operating voltage: 3.7-5 V Working temperature: -20 -75 Threepackage contents: Noted :Don't include retail box,if you need please contact us ! A: External TPMS Kit 1 xCar TPMS Display 4 x External sensor B: External TPMS Kit 1 x Car TPMS Display 4 x Internal sensor