RUPSE EK2 TPMS General Wireless Motorcycle Tire Pressure Monitoring System for Two-Wheeled Motorcycle Motorbike Easy installation- external sensor, small size, easy installation. A complete set DIY product, can be installed by cuatomer themselves Wireless display design - diaplay powered by 1 AAA batteryNot included, free of power cord troble, key chain style, compact, beautiful, and portable High accuracy - electronic pressure monitoring mode adopted, tire pressure accuracy up to  1PSI(0.1Bar Abnormal state of alarms - immediately alarms once tire pressure tire temperature below or above preset values Tire pressure & tire temperature, one key switch - tire pressure & tire temperature switched with one key, tire condition be clear at a glance