Wireless Car Tire Pressure Monitoring System LCD Digital Display Auto Tyre Pressure Temperature Warning Alarm TPMS Monitor with 4 External Sensors Feature: Real-time monitoring of tire pressure and temperature. Flat tire warning and temperature balance. LCD display, simple user interface. The display can be directly connected to the cigarette lighter socket. Buzzer alarm and display the alarm value. It can support four frequency bands, and the positions of the frequency bands are interchangeable. Visual and audible warnings of abnormal pressure and temperature. External sensor: easy to install and easy to replace. Dustproof/waterproof/anti-theft. Specification: Working voltage: 2.6-3.3V Working current: static 50uA, working current 15mA Working temperature: -30 - 85 Accuracy: Temperature: 1, pressure: 0.1bar Note: If you need a built-in sensor, please , now we are selling an external sensor. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow slightly measuring deviation due to manual measurement. 1 X Tire Pressure Monitoring System 4 X External Sensors 1set X Accessories (Tools)