A part of the review has been auto-translated.
As chain saw it is toy... after cutting 10 branch of 20mm diameter the motor is very close to burn-up (strong smell of heat coil); lubricating the saw guide is a little bit better - for chain saw only 3 stars ... but it can be very ease adapt to sand belt which is much better application for the motor power - for this opportunity i consider to give 5 stars ... soon i will put on thingiverse the printed 3D parts for this purpose (see pictures)
Okey where should i start. Package was poorly packed. It was loose and noisy. 3rd photo show how it came to me. battery was dead already. 1st impression was like "someone used this stuff before" Manual does not show how to tight chain (which direction). after I watch some video on youtube I was able to do it. Now i hope it will work as it was presented.