TPMS Wireless Tire Pressure Monitoring System Solar Power Clock LCD Display 4 External/Internal Sensor Tire Pressure Sensors Notice: Please push left button over 3 minitus to turn on monitor, if it does not work, please try again after charging. When you receive the package and turn on the receiver, the receiver displays --"or 00, please don"'"t worry. You only need to mount the sensor on the tire, wait for about 1 minute, and you will see the display shows the pressure and temperature of the tire. Features: 1: Anti-theft nuts;Easy installation; 2: High and low pressure, leak alarm; 3: Sensor accurate wireless transmission; 4: Environmental protection solar cells; 5: LCD display screen, Simple user interface; 6: Air leakage alarm, prevent tires from bursting; 7: High accuracy, Using Freescale imported chips; 8: Real-time monitoring tire pressure and temperature; Specification: Display: LCD color screen Sensor Battery life: ≥2 years (Replaceable) Packing size: 21 x 15 x 6cm (8.3 x 6 x 2.4 in) Package weight: 375g Operating Voltage: 3.7V-5V Operating temperature: -20--75 Adapt to temperature: -30--80 RF Transmit frequency: 433.92MHz 50KHz RF Operating Current: -90dbm Material Type: Plastic+Solar energy Package Contents 1 x Display screen, 4 x Sensor; 1 x English Instruction Manual, 1 x Plastic Cover; 1 x USB Cable, 4 x Screw Ring, 1 x Plastic Ring. Match sensor(charging/vent): Long press menu key"3 seconds to U/S,then short press menu key"several times to enterLID"interface,it shows ID of four tires and car icon.Short press left/right select key"to learn ID opertion.Select tire you plan to learn ID of sensor by pressmenu key,default setting is FL Product description: Solar TPMS is in the ordinary TPMS (tire pressure monitoring system) based on a flight-type upgrade, with features: real-time monitoring tire pressure, tire temperature, permanent life! Thus solving the general TPMS (tire pressure monitoring system) repeated charging, occupying the cigarette mouth, occupy a series of DVD display and other deficiencies! The composition of the solar TPMS is the same as that of the ordinary TPMS (tire pressure monitoring system), which is composed of a solar TFT screen receiving display and four pressure sensors / emitters. As the generous power generation panel long life, to provide at any time charging, so that the reception of the monitor power storage more robust and lasting; even in the absence of sunshine in the dark environment, rain and snow weather conditions can still serve more than 15 days, There are USB charger interface, dual charging system device to ensure that the machine really permanent life. How to change External Tpms battery