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