Drive Safer with Real-Time Tire Alerts – Premium Internal Sensor Upgrade! Upgrade your car’s safety with a Solar-Powered Tire Pressure Monitoring System (TPMS) featuring 4 internal sensors mounted inside each tire for best accuracy and protection. The clear LCD display gives you real-time pressure and temperature data, with instant audio & visual alerts for any abnormalities. Internal Sensors for Professional Grade Monitoring. 4 internal sensors mounted inside the tire – no exposed valve-cap sensors. Superior accuracy and durability compared to external types. Ideal for drivers who want long-term reliability and a clean installation. Solar & USB Dual Charging. LCD display powered by built-in 2200mAh Li-ion battery, charges via sunlight + included USB cable. Ensures uninterrupted monitoring whether parked or driving. Simultaneous pressure & temperature readings for all four tires. Selectable units: PSI/BAR and °C/°F for global compatibility. Enhanced Safety & Efficiency. Maintain optimal tire pressure to prevent blowouts, improve fuel economy and extend tire life. Instant alerts (sound + flashing) if pressure or temperature go outside set thresholds. Anti-Theft Lock Nut for Each Sensor. Even with internal sensors, locking nuts provide added security & prevent unauthorized removal (important if tire service is done). Note: Internal sensors often require tire dismount for installation; installation by a tire shop is strongly recommended. Power Source: Solar + USB (DC 5V). Battery Capacity: 2200mAh Li-ion, 3.7V. Display Type: LCD Digital Display. Frequency: 433.92 MHz. Working Temperature: -20°C +80°C. Type: External Valve Cap. Pressure Range: 0 – 116 PSI (0 – 8 Bar). Accuracy: ±1.5 PSI (±0.1 Bar). Sensor Battery: CR1632 (User Replaceable, 2 Years Life). 1 × Solar LCD TPMS Display Unit. 4 × Internal Tire Pressure Sensors (pre-installed within tires). 1 × Wrench Tool. 1 × USB Charging Cable. 1 × User Manual. ? Important Note & User Tips. Installation: Internal sensors require dismounting the tire from the wheel and proper balancing – professional installation is strongly recommended. Sensor Battery: Although sensor batteries last 2 years, internal sensors may require tire removal for replacement. Valve Access: Despite internal mounting, always ensure secure installation and proper calibration to obtain accurate readings. Automatic Car Washes & Parking: While hidden sensors reduce risk, still avoid excessive curbing or harsh impacts. Compatibility Reminder: Ensure your vehicle’s wheel/tire setup allows internal sensor mounting. Some specialty rims may require adapters or valve stem modifications. HTSTORE is dedicated to offering high-quality products, and we are confident in the quality of our offerings. We hope you will give us the opportunity to serve you! Our goal is to ensure that every customer is satisfied with our products and leaves us a five-star review. If you encounter any quality issues after receiving your product, we promise to provide prompt and thorough after-sales service. We sincerely treat everyone, hope not only shopping, but also feel the warmth of each other? (^_-).