Product description:ProfessionalRC Watt Meter is an excellent addition to your RC hobby, DC circuits, Solar system, Boat/RV & Battery Backup systems!Thisisn't just a watt meter-it's the All-In-One Meter! A power meter, a volt meter, an amp-hour meter, ammeter and energy meter. Everything all in one unit! This is the perfect troubleshooting tool. This all-in-one watt meter is indispensable for analyzing, testing and troubleshooting any DIY DC power project.Features:The digital LCD screen shows clear crisp number readings. Connecting load end to the battery providing real‑time battery charging reading.Digital LCD screen gives clear crisp number readings. The product has extremely low power consumption, which is more efficient than almost any LED meter. It acts like a wire so doesn't affect model's performanceHandles 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 systems.Extremely low power consumption of 36 mA. More efficient than any LED meter.Rugged- handles 50A continuous and 100 A peak at 60V.Actslike a wire so doesn't affect model's performance. Accuracy Alu-Chrom current sensing resistor, with only0.001 Ohms resistance and circuitry that draws only36 mA.Specifications:Color:BlueCurrent:0-100 A peak 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: Approx.36 mA.Size:8.3cm x 4.7cm x 2cm - 3.27inch x 1.85inch x 0.79inchPackage Included:1Pcs x Watt Meter.