Features:_x000D_ Auto MPPT Detection: When pressing the AUTO MPPT test button, the instrument automatically adjusts the test interval time according to the current power value and refreshes the digital display. For example, when the power of solar panel is 100W, refresh once every 5S._x000D_ Manual MPPT Detection: When pressing the manual MPPT test button, the instrument starts a scan of the maximum power point and refreshes the digital display._x000D_ Open Circuit Voltage Real-time Display: The open circuit voltage will display on the large LCD screen at any time, giving you a better experience._x000D_ Large LCD Backlight Display: The screen adopts large LCD with backlight for easy reading no matter in the or at night; you can turn on/ off the backlight as you like._x000D_ Multiple Safety Protections: Over-voltage/ over-current/ over-temperature/ over rated power protections ensure safe use._x000D_ Wide Application: This multimeter can be widely used by PV panel manufacturers/ distributors/ installers/ users and anyone who is interested in PV panel._x000D_ 2 Models Optional: EL400B/ EY800W. They have different power and current. EL400B (0.1-400W, 0-20A); EY800W (5-800W, 0-35A)._x000D_ _x000D_ Note: Size and color may be slightly different due to manual measurement and different lighting conditions. Thanks for understanding._x000D_ _x000D_ Specifications:_x000D_ Model: EL400B/ EY800W (Optional)_x000D_ Color: Multicolor_x000D_ Material: ABS_x000D_ Power Supply Mode: Solar Panel_x000D_ Voltage: 12-60V_x000D_ Power:_x000D_ EL400B: 0.1-400W_x000D_ EY800W: 5-800W_x000D_ Current:_x000D_ EL400B: 0-20A_x000D_ EY800W: 0-35A_x000D_ Item Size: 165 * 80 * 30mm / 6.50 * 3.15 * 1.18in_x000D_ Package Size: 25 * 13 * 6.5cm / 9.84 * 5.12 * 2.56in_x000D_ Package Weight: 500g / 1.10lbs_x000D_ _x000D_ Package List:_x000D_ 1 * Solar Panel Multimeter_x000D_ 1 * Connecting Cable_x000D_ 1 * Alligator Clip Cable_x000D_ 1 * EVA Toolkit_x000D_ 1 * User Manual (English)