This tire preure monitor can display the four tire preure in real-time, help users monitor the tire condition in-time, enhance riding safety, and has the function of clock,which is suitable for a variety of models.Features:Intelligent accuracy: real-time monitoring of four tire preure, tire temperature, precisions and efficiency, can timely grasp the tire situation, reduce the incidence of accidents, and enhance driving safety.Two kinds of sensors are available: users can choose the built-in sensors set or the external sensors set according to their needs.Clock and power display: with clock display, it can display time, power and other information at the same times to remind users to charges in-time.Wirele transmiion: data wirele transmiion, intelligent and efficient, real-time update.Solar powered design: energy saving and efficient, in the proce of driving can also charges, long lifes, but also can use USB chargings cable.360 rotatable: the tire preure monitor can rotate 360 and adjust 45 up and down, fixed at an appropriate angle and field of views.Specifications:Material: aluminum alloy and copper and plasticsType: Internal sensors set, External sensors set (optional)Receiver:Battery: built in 3.7V, 400mAh lithium batteryWorking voltage: Direct Current 5VTransmiion frequency: 433.92MHzPreure unit: psi or barTemperature unit: Deg.C or Deg.F.Working temperature: -20 - 85Storage temperature: -40 - 125Internal sensors:Working preure: 0 - 51psi or 0 - 3.5barPreure accuracy: 0.1barTransmiion frequency: 433.92MHzWorking temperature: -20 - 85Storage temperature: -40 - 125Working voltage: 2.0 - 3.6VWaterproof grade: IP67Battery: built in CR24500 batteryBattery lifes: about 2 - 5 years (not replaceable, the sensors needs to be replaced when the battery has run out of power)External sensors:Working preure: 0 - 51 psi or 0 - 3.5 barPreure accuracy: 0.1barWorking frequency: 433.92MHzWorking voltage: 2.0 - 3.6VWaterproof: IP67Working temperature: -40 - 85Storage temperature: -40 - 125Battery: built in CR1632 120mAh batteryBattery life: about 1-2 years (replaceable battery)Item weight:Internal sensors set: 270g or 9.5ounceExternal sensors set: 170g or 6.0ouncePackage size: 160 x 140 x 58mm or 6.3 x 5.5 x 2.3inPackage weight:Internal sensors set: 320g or 11.3ounceExternal sensors set: 220g or 7.8ouncePacking List:Internal Sensors Set:1 x Receiver4 x Internal Sensors1 x USB Cable1 x User ManualExternal Sensors Set:1 x Receiver4 x External Sensors4 x Screw1 x Spanner1 x USB Cable1 x User Manual