This product is a charging tester, high accurancy and simple to operate.    Features:  Using 1.44in LCD display, multi-directional viewing angle conversion, 160° wide viewing angle, high brightness, long working time, so you can enjoy bright and delicate colors, natural display srceen from any angle.  The product integrates 2 systems, and the system is switched by hardware switches, which is convenient and quick.  The screen supports four-way rotation.  High accurancy and high sensitivity.  Short press the rotary encoder button, select the corresponding position, the corresponding number will be reversed, and use the rotary encoder to switch the theme background color and foreground color.  The product has constant current function, which can charge all kinds of small rechargeable batteries within 0.6V~30V within 10~20W.  The product has constant current function, which can directly drive 0.6-30V, 0-15W LED lamp.  This product can realize the stepless dimming of LED by adjusting the constant current value (between 0-working current) without flicker.    Specifications:  Main color: black  Input voltage: 3.5-24V  Output voltage: 0.6-30V  Output current: 0.000-2.000A  Output power: 20W  Capacity range: 0-999999Ah  Energy range: 0-999999Wh  Time range: 0-1000h  Screen brightness setting: 6 level  Voltage measurement resolution: 0.01V  Current measurement resolution: 0.001A  Voltage measurement accuracy: ±0.3％+1 word  Current measurement accuracy: ±0.5％+1 word  Data refresh rate: 4HZ (250MS)  Temperature measurement range: -10℃ to 100℃ (±3℃)  Delay off screen time: 0-9 minutes  Item size: 86 * 37 * 15mm / 3.4 * 1.5 * 0.6in  Package size: 93 * 63 * 20mm / 3.7 * 2.5 * 0.8in  Package weight: 70g / 2.5ounce    Packing List:  1 * Charging Tester  1 * Cable