Feature: 1. Simultaneous 4-wheel tire pressure and tire temperature display 2. Abnormal tire pressure and tire temperature alarm: 3.2 bar (default) high tire pressure alarm 1.8 bar (default) low tire pressure alarm Over 68 (default) high tire temperature alarm The default value can be adjusted according to actual needs. Specification: Receiver Receiving frequency: 433.92MHz Power supply mode: USB input, solar powered Working voltage: DC 5V Pressure unit: bar/psi Temperature unit: C / F Working temperature: -20~85 Storage temperature: -40~105 External sensor Transmission frequency: 433.92MHz Pressure range: 0~3.5 bar Default low pressure alarm value: 1.8 bar Default high pressure alarm value: 3.2 bar Pressure accuracy: 0.1 bar / 1 psi Operating voltage: DC+2.0~3.6V Working temperature: -20~85 Storage temperature: -40~125 Waterproof level: IP67 Battery: built-in CR1632 button battery (removable and replaceable battery) Battery life: 1.5-2 years Note: There may be slight size deviations due to manual measurement, different measuring methods, and tools. The pictures may not reflect the actual color of the item because of different photographing lights, angles, and monitors. Whats included: 1 X Receiver 4 X External Sensors 1 X USB Cable 4 X Anti Theft Nuts 1 X Manual Packing list 1 X Receiver 4 X External Sensors 1 X USB Cable 4 X Anti Theft Nuts 1 X Manual