Features: 4 external/internal sensors, built-in CR1632 3.7V cell, monitor frequency: 433.92MHz. Real-time monitoring per 3s, can monitor preure and temperature at any time. Reduce driving risks and fuel consumption, prolong lifetime of tires. Electronic preure detection, high accuracy. Abnormal status alert, flash and icon alert, alarm can be set. Lightweight design of emitter, wide angle screen design, portable and convenient. Support English / Chinese language. Monitoring battery voltage of vehicle. 2 options of preure unit: PSI / Bar. Suitable for Toyota (Embedded, Size: 34mm x 23.5mm x49mm) Specifications: Material: ABS Color: Black Type: External/Internal Working humidity: 100% Battery life: 3~5 years (can be used 3~5 years while drive 3-4 hours a day) Preure testing range: 0~8 BAR (0~16PSI) Temperature testing range: -40~ +125 (Internal Sensor)-40~ +85 (External Sensor) Transmiion frequency: FSK433.92MHZ. Notice and statement: Product is only suitatble for car series preure range with 8 bar. Safety of car tyre can not be relyed on products all. Driver should periodically check the tires, make sure the tire puncture, cut, drum kits and other inqury-free. When product warn, car should be stopped as soon as poible and deal with it. Product cannot predict sudden tire damage caused by external forces. Don't operate this product while driving. Sensor battery life aociated with mileage of the car. Package Included: (External) 1 x Monitor 1 x Power Line 1 x Spanner 1 x User Manual 2 x Open- wrench 4 x Lock Nuts 4 x External Sensors Package Included: (Internal) 1 x Monitor 1 x Power Line 1 x Spanner 1 x User Manual 1 xWarning Sticker 4 x Internal Sensors 4 x Valve