①. Digital LCD screen gives clear crisp number readings. Handles up to 100 amps intermittently and 50 amps continuous duty. ②. 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 systems. Low power consumption of 7 mA. More efficient than some LED meters. Measure energy(wh), charge(ah), power(w), current(A) and voltage(V). ③. Accurate & precise 0.01 A current and 0.01 V voltage resolutions. Measures Amps, Watts(except for Wattson) and Voltage minimum(sag). Rugged- handles 50A continuous and 100 A at 60V. ④. 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 to increase ADC resolution and differential measurement amplifiers to increase noise immunity. ⑤. Voltage:(0)V-4V-60V 0.01V (Resolution). ⑥. Current:0-100 A 0.01A (Resolution). ⑦. Power:0-6554 W 0.1W (Resolution). ⑧. Charge:0-65 Ah 0.001Ah (Resolution). ⑨. Energy:0-6554 wh 0.1 Wh (Resolution). ⑩. Measurement Update period:400mS. ⑪. Signal Sampling Rate:sample/s. ⑫. Data Queue Sequence time: 2 seconds. ⑬. In Circuit Resistance:0.001 Ohms. ⑭. Operation Current: 36 mA. ⑮. Material:plastic ⑯. colour:blue ⑰. Package Contents: 1 x Watt Meter. Only the above package content, other products are not included. ⑱. 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.