Both are defect , very poor quality . Search google / YouTube on coolcam plug and you will see that this is crap. Wish that I searched better before I bought this
Compact size, compared to similar products. fast delivery (3wk to italy). i will put additional feedback once tested for power measurement and connections tability
Remarkably good precision for such a device. Voltage is precise to 2 volts and current is reasonably precise (3 plugs i bought are 10 mA apart one eachoter, on a resistive load.) measure is close to the readout from a yokogawa power meter, all 3 plugs within 5% which is not bad at all. Long term stabilty and reactive load are to be verified but for the general purpose of such a device is remarkably good indeed.