Brand new and high quality. Digital LCD screen gives clear number readings. Handles up to 100 amps intermittently and 50 amps continuous duty.Connecting load end to the battery provides real-time battery charging reading. Handles 0 to 60 volts. Works on 12, 24, 36, and 48 volt battery bank . Extremely low power consumption of 7 mA. More efficient than any LED meter. Measure energy(wh),charge(ah), power(w),current(A) and voltage(V).Accurate & precise 0.01 A cuurrent and 0.01 V voltage resolutions. Measures Amps, (except for Wattson) and Voltage minimum(sag).Rugged- handles 50A continuous and 100 A at 60V.Acts like a wire so doesn't affect model's performance. Precision Alu-Chrom current sensing resistor, with only 0.001 Ohms resistance and circuitry that draws only 36 mA. USes DSP to increase resolution and differential measurement amplifiers to increase noise immunity.Voltage:(0)V-4V-60V 0.01V (Resolution).Current:0-100 A 0.01A (Resolution).Power:0-6554 W 0.1W (Resolution).Charge:0-65 Ah 0.001Ah (Resolution).Energy:0-6554 wh 0.1 Wh (Resolution).Measurement Update period:400mS.Signal Sampling Rate:sample/s.Data Queue Sequence time: 2 seconds.In Circuit Resistance:0.001 Ohms.Operation Current: 36 mA.Material:plasticcolour:bluePackage Contents:1 x Watt MeterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.