Key Features: USB Port for connecting this Android unit, just plug and play, support TPMS Display Input, Touch Control and Power Supply - Built-in World-leading Freescale Chip FXTH87 , which is a highly integrated tire pressure sensor. - TPMS App file included in the supplied USB stick, just buy this USB TPMS product for Tire pressure monitoring. APP compatible for all Car Stereos / Autoradios with Android 5.1 / 6.0 / 7.1 / 8.0 / 8.1 / 9.0 / 10.0 or above Car Multimedia System. - Simultaneously monitor and display all the 4 tires"'" pressure or temperature. - USB interface: Plug and play , easy and convenient installation; 4 internal sensors : easy to be mounted and replaced. - Alarm when pressure & temperature is not up to standard like flat tire, improve fuel efficiency, prolong tire lifespan, ensure driving safety. - Standard alarm value of pressure and temperature. - Alarm when air escapes from the tires quickly and suddenly. - Display & Sound alarm - Designed for most of 4-tire cars. - Menu language: In English only. - Alarm: Low / High Pressure, High Temperature, Low Battery, Quickly / Slowly leaking. Note: 1. There are 2 Types of TPMS sensors on the market: Internal Sensor and External Sensor . Our item is the Internal Sensor with waterproof function. For External sensor version, please buy ES341 in our shop. 2. Android Car Radios with Qualcomm Rockchip System: NOT SUPPORT!!! What is TPMS? TPMS stands for tire pressure monitoring system. As its name suggests, a tire pressure monitoring system is more than a single part. In fact, TPMS involves a valve and a sensor, and it"'"s also important to know that not all TPMS systems are created equal.There are two kinds of TPMS technologyindirect and direct. Indirect TPMS approximates tire pressure indirectly by using data from the vehicle"'"s antilock brake system (ABS). Direct TPMS is a warning system that warns a vehicle"'"s operator of an unsafe change in the air pressure in one or more of the tires. Readings are provided by pressure sensing transmitters mounted inside each tire and sent to a central computer (ECU) for display on the dashboard. A warning indicator light on the instrument panel and an audible warning notify the driver if a 25% drop in pressure occurs. How Does TPMS Work? With both direct and indirect TPMS, if a tire is detected to be underinflated by 25% or more, an alert lights up on your dashboard. But with direct TPMS, drivers are alerted sooner and if the car is equipped with the four-tire TPMS displaycan even see readings for each tire. One of the largest downsides of an indirect TPMS system is that it cannot detect when all four tires are low in pressure, which can happen quite frequently if tire pressure is not checked on a regular basis. To get a better understanding of how TPMS works and how it helps make driving safer. You can learn more about direct vs indirect systems here. Specifications: - Working Voltage: 2.1V~3.5V - Working Temperature: -40C~ +80C - Storage Temperature : -40C~ +85C - Pressure measurement range: 0~8 bar(0~116 psi) - Pressure accuracy: 1.5 psi (0.1bar) - Temperature sensitivity: 3 - Transmission frequency: 433.92MHz - Material: Plastic - Color: Black - Size: 87mm * 55mm * 13mm - Sensor: Diameter 30mm, Height 10mm - Weight: 415g - Battery life: 5 Years (4pcs Lithium batteries built-in the 4 sensors) (Lithium Battery replacable , Model number: CR1632) - CE Certified Parcel Content: - 1* USB Car TPMS Module Box - 4* Internal Sensors - 1* USB Stick with TPMS APP file - 1* Double Sided Adhesive Tape to fix the TPMS box - 1* User manual in English (just for reference, not 100% accurate)