Solar Car TPMS for Android Car Stereo Radio Wireless Tire Pressure Tyre Temperature Monitoring Alarm System with 4 Sensors Feature: 1. Tire pressure and tire temperature are displayed at the same time. 2. Alarm for abnormal tire pressure and temperature: Alarm when tire pressure is higher than 3.2 bar (default value); Alarm when the tire pressure is lower than 1.8 bar (default value); Alarm when the tire temperature is higher than 68 (default value); The default value can be adjusted according to actual needs. 3. Connect with Android car radio to install app, and the app can display real-time air pressure, temperature, pop-up alarm or voice alarm can be set. 4. 5 alarm modes: quick leak alarm, high/low pressure alarm, high temperature alarm and sensor low pressure alarm. Specification: Receiver Receiving frequency: 433.92MHz Power supply mode: USB power supply, solar power supply Working voltage: DC 5V Pressure unit: bar / psi Temperature unit: / Working temperature: -20~+85 Storage temperature: -40 ~+125 Internal sensor Transmitting frequency: 433.92MHz Pressure range: 0~5bar / 0~67psi Default low pressure alarm value: 1.8 bar Default high pressure alarm value: 3.2 bar Pressure accuracy: 0.1 bar / 1.5 psi Working voltage: DC+2.0~3.6V Working temperature: -20~+85 Storage temperature: -40~+125 Waterproof level: IP67 Battery: Built-in CR2450 button battery Battery life: 2-3 years External sensor Transmitting frequency: 433.92MHz Pressure range: 0~5bar / 0~67 psi Default low pressure alarm value: 1.8 bar Default high pressure alarm value: 3.2 bar Pressure accuracy: 0.1 bar / 1.5 psi Working voltage: DC+2.0~3.6V Working temperature: -20~+85 Storage temperature: -40~+125 Waterproof level: IP67 Battery: Built-in CR1632 button battery (the battery can be removed and replaced by yourself) Battery life: about 1 year Color box size: 190*145*40mm (External Sensor), 195*132*57mm (Internal Sensor) Gross weight: 200g (External Sensor), 300g (Internal Sensor) Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Package includes: 1 X Receiver 4 X Sensors 4 X Anti Theft Nuts for External Sensors (Optional) 1 X Wrench 1 X Anti Slip Mat 1 X Manual Packing list 1 X Receiver 4 X Sensors 4 X Anti Theft Nuts for External Sensors 1 X Wrench 1 X Anti Slip Mat 1 X Manual