Product choice:Black: external sensor blackSilver: External sensor SilverGray: Internalsensor grayProduct Features:1.Universal suitable for almost of all two-wheeled motorcycles,easy to install.self-matching, simple to operate, convenient to use2. Powered by USB cable,2 external or Internal sensor3. Built-in high temperature resistant explosion-proof lithium battery,fast charging, long lasting power4. Real-time display of highly accurate tire temperature and preure data of 2 wheels at the same time5. Quickly detect leak and alarm, extend tire life, balance tire preure, ensure the safety of motorcycles6.PSI, BAR two kinds of preure unit optional, and two kinds of temperature unit optional7. Each sensor has a separate ID code, which has been completed before delivery, can be directly used after installation8. TPMS dedicated radio frequency technology, the sensor real-time updates data, alarm when tire preure and temperature are abnormal9. TPMS dedicated Freescale chip program, 6-in-1, makes the signal more stable and reliable, monitoring data more accurate to ensure traffic safety10.You can purchase the same type of battery for replacement after the battery run out, without having to return the external sensor to the factory(except the internal sensors).Display parameters:Size: about 48 * 48 * 27MM/1.89 * 1.89 * 1.06inWeight: about 50GBuilt-in lithium battery capacity: 850 mAhWorking temperature: (- 20 ~ +80 )Storage temperature: (- 30 ~ + 85 )Receiving frequency: 433.92MHzSensor parameters:Working temperature: (- 40 ~ + 105 )Storage temperature: (- 40 ~ + 120 )Preure range: 0 ~ 116psi (0 ~ 8bar)Preure accuracy: 0.15PSI ( 0.01bar)Temperature accuracy: 3 Transmiion frequency: 433.92MHzBattery life: about 2 years (external sensor)Size(approx.): Height: 13mm/0.51in, Diameter: 18mm/0.71in (external sensor)Weight: about 6.0g(external sensor)Battery life: about 5 years (Internal sensor)Size(approx.): 48*45mm (Internal sensor)Weight: about 36g(Internal sensor)Note: the product has been optimized for configuration before delivery, please switch the screen on first, and then install the sensor in turn, if you do so, generally, you do not need to set the parameter anymore.Package:1*M3-B monitor2*Sensors1*Power cable1*Spanner2*Theft-proof nut1*Holder1*Open wrench1*Clamp