This mini chainsaw has everything to be a best seller. In theory !!! When received, the first issue that has caught my attention is that Instructions Manual was only in Chinese Language, so I was not able to know single issues as how and the periodicity of oiling the chain, what is much important. I have asked to seller an electronic file translated to English but, after several requests it was never sent. I have tried to contact the manufacturer and with also no answer. The screwdriver that came together has broken at the first use, so bad quality it has. Well, after 3 months of use, I can tell that the battery is also of bad quality because, even fully charged, I am not able to saw any single wood piece. In conclusion : - the idea behind is very good but the quality is awful.