... hoursAdjustable output voltage: DC4.8 V / 5.8 V / 8.4 V / 9.0 V (+ /-0.2 V)Output current: 400 mA- ... voltage indicator, after startup product default output 4.8 V, long press adjusting button (3 seconds 5 seconds) which can ... adjust output 4.8, 5.8 V, 8.4 V, 9.0 V. Each long as a, can adjust a voltage output ... 3, after startup, when once again ON/OFF button long press: can light up the ultra bright LED, ...