English: Alarm Monitor: TPMS displays the pressure or temperature of 4 tires simultaneously. TPMS automatically updates tire pressure and temperature, ensuring your driving safety. The tire pressure monitoring system warns when tire temperature is high or pressure is low. Alarm for slow and fast air leak in case of puncture. High pressure alarm value: 3.1 bar Low pressure alarm value: less than 1.8 bar High temperature alarm value: 75 ℃ Standard air pressure unit: Bar Technical parameters for sensors: 1. Working voltage: 2.1-3.6 V 2. Pressure measurement range: 0-8 bar 3. Temperature measurement range: -40-125 ℃ 4. Sensor weight: external less than 10 grams, internal less than 34 g 5. Working frequency: 433.92 MHz Technical parameters for receiver: 1. Working voltage: DC12V 2. Maximum working current: less than 15 mA 3. High-frequency working frequency: 433.92 MHz 4. Working temperature: -40-85 ℃ 5. Communication line length: 20 cm Name: TPMS external sensor for spare tire Voltage: 5 V Special features: USB TPMS Item weight: 0.16 kg Model name: Tire Pressure Monitoring System for Android Player Item type: Alarm and security systems External sensor: Easy to install, easy to replace Dustproof/waterproof/anti-theft Anti-high temperature and cold IP67 protection/waterproof Working temperature: -20-85 °C Sensor battery: Button battery Battery life: 2 years, replaceable Carrying method: Portable Applicable model: Display mode: Digital Appearance: Mini Specifications: External USB tire pressure gauge Type: Tire pressure monitoring system Tire pressure gauge Accuracy type: High precision Color: Black Material: Plastic Package contents: 1 x Receiver 4 x External sensors (Button battery) 1 x USB cable 1 x Wrench 4 x Nuts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.