Descriptions Tyre Pressure Monitiring Sysyem: Prevent flat tire, keep air pressure balanced, saving fuel and reducing wear. External Sensors ready-to-use, four-wheel simultaneous display; Replaceable external battery, about two years life (installed on the valve core). Anti-corrosion coating shell surface. Hexagonal nuts anti-theft patent. Patented silicone integrated structure for external tire pressure sealing to prevent air leakage;. Replaceable built-in L battery, about five years life. Aerospace alloy gas nozzle. Nylon chemical fiber shell to prevent corrosion. An adjustable angle link between the gas nozzle and the sensor. Features: Efficient solar panels, solar powered duration life; Large-capacity built-in lithium battery; Precise monitoring of tire pressure; LCD high-precision display; Loud alarm sound warning; A variety of tire pressure units are optional; Long receiving distance, stable signal; Support tire position interchanging. Specifications: Air pressure setting range: 0. 1~8. 0BA Temperature setting range: 60~ 110?. Working temperature: -20~ 80?. Storage temperature: -30~ 85?. Energized voltage: DC 5V. Frequency: 433. 92MHz 20. 00 MHz. Size: 80 x 73 x 15mm/3. 15 x 2. 87 x 0. 59". Weight: 68g. Included: 1 x Host Machine, 4 x Sensors, 1 x USB Charging Cable, 1 x Accessories Bag.