0.36" Red LED Digital Fine Tuning DC Voltmeter w/ Reverser Protection (2.4~30V)
Working voltage: DC 2.4~30V (with reverse protection function); Detection voltage: DC 2.4~30V; Working current: <30mA; Display: 0.36" red LED; Installation hole: 23 x 14.5mm; Measurement rate: >/=200ms/times; Measurement accuracy: 3%; Low working voltage: 2.4V; Max. working voltage: 30V; Working temperature: -10~65'C; Working humidity: 10~80% (No condensation); Working air pressure: 80~106kPa; Suitable for 18650 battery Cell phone lithium battery NI-MH battery pack motorcycle car battery voltage etc.