New and high quality. Digital LCD display provides clear and sharp numbers. Handles up to 100 Amps intermittent and 50 Amps continuous operation. Connecting the load end to the battery provides real-time battery charge readings. Handles 0 to 60 Volts. Operates on 12, 24, 36, and 48 Volt battery bank systems. Extremely low consumption of 7 mA. More efficient than any LED meter. Measures Energy (Wh), Charge (Ah), (W), Current (A), and Voltage (V). Accurate and precise 0.01A current and 0.01V voltage resolution. Measures Amperage, Wattage (except Wattson), and Voltage minimum (drop). Robust - handles 50A continuous and 100A at 60V. Acts as a wire, so it doesn't affect model performance. Precision Alu-Chrom current sensing resistor, with only 0.001 Ohm and circuits drawing only 36 mA. Uses DSP to increase ADC resolution and differential amplifiers to increase noise immunity. Voltage: (0)V-4V-60V 0.01V (resolution). Current: 0-100A 0.01A (resolution).: 0-6554 W 0.1W (resolution). Charge: 0-65Ah 0.001Ah (resolution). Energy: 0-6554Wh 0.1Wh (resolution). Measurement update period: 400mS. Signal sampling frequency: samples/s. Data queue time: 2 seconds. In circuit: 0.001 Ohm. Operating current: 36 mA. Material: plastic color: blue Package Contents: 1 x Watt Meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.