It has the ability to sample 12 independent channels (i.e., 6 lines of voltage and 6 lines of current), simultaneously. The sampled data is stored on a memory card at an adjustable (user-set) sampling frequency. Finally, the stored information can be analyzed on the computer or by the device itself and the desired results can be then reached. The important capabilities of this product are as follows 1. Capability to measure harmonics up to 20 kHz. 2. Very high measurement accuracy (Adjustable) 3. Capability to measure 12-channel harmonics simultaneously and independently. 4. Very low price compared to similar foreign ones. 5. The capability of analysing the data online and offline. 6. Easy usage.