Digital tire pressure gauge (a white light) 1. Measure range: 0.00-11.00 KG/cm2, 0.00-150.00 psi 0.00-1.10 mpa 2. Clear, LCD display 3. Temperature range:0-50o 4. Unit changeable: KG/cm2 - psi - mpa 5. Power source: Lithium and lr41 alkaline 6. Supply voltage: Mcu-3.0v Led-4.5v(a white light) Write us now for more detail.