TY17 TY18 Solar Car TPMS with Clock Auto Tire Pressure Tyre Temperature Monitoring Alarm System Specification: Model: TY17 (internal sensor), TY18 (external sensor) (Optional) TPMS receiver Battery: Built-in 400mAh lithium ion battery Working voltage: DC 5V RF transmission frequency: 433.92MHz Pressure unit: psi / bar Temperature unit: Deg.C / Deg.F Working temperature: -20~ +85 degrees Celsius Storage temperature: -40~ +125 degrees Celsius Material: plastic Colour: Black Chip: for Infineon Size: 97*31mm/3.82*1.22" Installation methods: 1, place on the dashboard; 2, stick on the windshield External sensor (Optional) Working pressure: 0-51 psi / 0-3.5 bar Pressure accuracy: +/- 0.1BARi Working frequency: 433.92MHz Working voltage: 2.0-3.6V Waterproof: IP67 Working temperature: minus 40-plus 85 degrees Celsius Storage temperature: minus 40-plus 125 degrees Celsius Battery: Built-in CR1632 120mAh button battery Battery life: 1-2 years (replaceable battery) Internal sensor (Optional) Working pressure: 0-51 psi / 0-3.5 bar Pressure accuracy: 0.1bar Transmission frequency: 433.92MHz Working temperature: -20~ +85 degrees Celsius Storage temperature: -40~ +125 degrees Celsius Working voltage: 2.0-3.6V Waterproof rating: IP67 Battery: Built-in CR24500 button battery Battery life: 2-5 years (not replaceable, the sensor needs to be replaced when the battery is dead) Note: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. 1 X Monitor 4 X External Sensors (Optional) 4 X Anti-Theft Nuts (Optional) 1 X Wrench (Optional) 4 X Built-In Sensors (Optional) 1 X USB Cable 1 X Manual