This product sensor is connection Car tires external or Built-in Need to determine the installation size of the car panel, thank you! Features: - 4 external sensors, built-in CR1632 3.7V cell, monitor frequency: 433.92MHz. - Real-time monitoring per 3s, can monitor pressure and temperature at any time. - Reduce driving risks and fuel consumption, prolong lifetime of tires. - Electronic pressure 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 pressure unit: PSI / Bar. - Suitable for Toyota. - Displayer size: 34 x 23.5mm. Package included: Display host*1 Sensor *4 \"'" "'"