Features: 1. Monitor tire pressure and temperature in real time to increase driving safety. 2. Visual and audible warning of tire pressure and temperature anomalies. 3. Intelligent sleep mode saves energy to achieve low power consumption. 4. It also has a tire leak warning function, and the tire pressure and temperature data are readable. 5. The psi/bar pressure unit and C/F temperature unit are optional. Specification: Material: ABS Color: as shown in the pictures Type: Digital Model: C-240 Operating Frequency: 433,9200 MHz Operating Voltage: 5 V Operating current (static current): 30uA Operating Current (Dynamic Current): 8mA Working environment: -40 - 85 Pressure detection range: 099 psi, 05 bar Charging Mode: Solar/USB Power Battery life: external sensor 3 years List of packages: 1 * solar energy digital display monitoring system screen 4 * External sensor 4 * Nut 1 * key 1 * Instructions 1 * double-sided adhesive Note: This product can monitor tire pressure and temperature in real time and alert you.