1. magnetic charging design. 2. Real-time display of highly accurate tire temperature and pressure data of 2 wheels at the same time 3. Extend tire life, balance tire pressure, the safety of motorcycles 4. TPMS dedicated radio frequency technology, the sensor real-time updates data, alarm when tire pressure and temperature are abnormal 5. High standard to dust-proof,waterproof and high temperature proof. [Magnetic Charging]Very convenient magnetic charging design. [Intelligent AI Chip]Air leakage alarm,Low pressure alarm,High voltage alarm,Low battery alarm,High temperature alarm. Sensor: Operating frequency: 433.92MHz ± 15MHz Operating voltage: 2.1-3.3V Operating temp.: -40 - +105Celsius Pressure range: 0-8Bar / 0-116PSI Sensor size: 23mm * 15mm () / 18mm * 13mm(WI) Display: Operating frequency: 433.92±15MHz Battery Type: Build on with lithium battery USB power line for charging Display size :48mm*48mm*27mm Colour:black Material:ABS Package Contents: 2 x Host Display 4 x Sensor 2 x Bracket 2 x Spanner 4 x Anti theft nut 2 x USB cable 2 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.