Nova NHC-3768 Pro Skin Advanced Trimmer is not good in performance its battery backup is very poor, you can use only one time if its fully charged and also it’s blade quality is not good. I used this trimmer this is very poor in performance and it’s not user friendly trimmer. This is not very effective trimmer, design of this trimmer is not good that are inconvenienc for handling and there are no customer service and support so this is not a good trimmer.