Feature 1、Performance: High efficiency solar panels, long battery life, large capacity built in metal lithium battery, unimpeded battery life in cloudy days. 2、Accurate Monitoring: Accurately monitor tire pressure and tire stability throughout the process, reduce the danger caused by tire problems while driving. 3、LCD Display: LCD high precision liquid crystal display helps you read and observe the condition of your vehicle's tires while driving. 4、Excellent Features: Loud volume alarm sound warning, various tire pressure units are optional and support tire position swap. 5、Stable Characteristics: Long receiving distance and stable signal, IP67 waterproof and and can be used in all climates and weather. Item Type: Tire Pressure Monitor Material: ABS Receiver Parameter: Reception Frequency: 433.92MHz Power Supply: USB power supply, solar power supply Operating Voltage: DC 5V Pressure Unit: bar/psi Temperature Unit: ℃ / ℉ Operating Temperature: -20 -- 85℃ Storage Temperature: -40 -- 105℃ Transmission Frequency: 433.92MHz Pressure Range: 0.1-8 bar Default Low Voltage Alarm Value: 2.8 -- 6 bar Default High Voltage Alarm Value: 6 bar Pressure Accuracy: ± 0.1bar Operating Voltage: DC+ 2.0-3.6V Operating Temperature: -20 -- 85℃ Storage Temperature: -40 -- 125℃ Waterproof Level: IP67 Battery: 6 CR1632 button battery 120mAh 3.0V (shipped with built in battery) Monitor Battery 1 lithium battery 5000mAh 3V (shipped with built in battery) Battery Life: 1.5-2 years typical Package List 1 x Tire Pressure Monitor6 x Sensor 6 x Anti Theft Nuts 1 x Anti Slip Pad 1 x USB Data Cable 1 x Wrench 1 x User Manual