Features: brand new and high quality Made of high-quality materials, durable Electronic combination meter measurement function (voltage, current, power, watt-hour) Overload alarm function (high power limit backlight and voltage value flashing) Voltage alarm preset function (voltage alarm value can be set) Watt hour value clear function Power-off data saving function Large-screen LCD display (simultaneous display of voltage, current, power, watt hours) Blue LED backlight ON/OFF function. No need to use any shunt Tip 1: 0-20A has a built-in current shunt, and 0-50A and 0-100A have an external shunt. Tip 2: Do not use this meter in a high-interference inverter environment, such as "inverter DC". Frequent power outages, harmonic interference, etc. will burn the meter. Product parameters: Specifications: 0-20A (built-in shunt), 0-50A (50A shunt), 0-100A (100A shunt) Working voltage DC 6.5~100V Voltage measurement range: DC 6.5~100V (display format: 6.50~99.99V) Current measurement range: 0~20A; 0~50A (display format: 0.00~50.00A); 0~100A Rated power: 0~2kW (display format: 1kW 1000~4500W) Electric energy measurement range: 0~9999KWh (display format: 10kWh 10~9999kWh) Working frequency: 45~65 hz Measurement accuracy: level 1 Wiring required: the order of wiring must be ok Dimensions: 89.6mm (W) x 49.6mm (H) x 24.4mm (D) Cut size: 84.6mm (W) x 44.6mm (H) The package includes: 1 *Digital LCD combination panel instrument 1 * Shunt Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data. Made of high-quality materials, durable Electronic combination meter measurement function (voltage, current, power, watt-hour) Overload alarm function (high power limit backlight and voltage value flashing) Voltage alarm preset function (voltage alarm value can be set) Watt hour value clear function