Features: Accurately monitor tire preure all the way. High-efficiency solar panel, long battery time. Built in metal lithium battery for uninterrupted battery life on cloudy days. Multiple tire preure units are available. Tire position interchangeable. High volume alarm sound warning. LCD high precision display. Long receiving distance, stable signal. With 6 tire preure monitoring sensors, suitable for trucks, buses, caravans, etc Specification: Receiver: Operating voltage: DC 5V RF transmiion frequency: 433.92MHz Preure unit: psi / bar Temperature unit: Deg.C / Deg.F Operating temperature:-20-+85 Storage temperature:-40-+125 External Sensor: Working preure: 0-101.5 psi / 0-7 bar Preure Accuracy: 1.5PSI (0.1bar) Operating frequency: 433.92MHz Operating voltage: 2.0-3.6V Operating temperature:-40-+85 Storage temperature:-40-+125 Battery: Internal CR1632 120mAh button cell Battery life: 1-2 years (replaceable batteries) Note: Only for vehicles with a maximum preure below 7 bar(101.5 PSI). 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 pographing light, angle and display monitor. Package Included: 1 X Receiver 1 X USB Cable 1 X Spanner 6 X Nuts 6 X Sensors 1XUser manual