Probably most suitable for my purposes. The following features: + Bright light dot over 5m + Switches the front and back films over 5m. It does not matter how I hold the pen (down, up, back - everything works) (Tuck USB and there you go - tested on Windows) + easy installation + Practical case, here, up to 3 batteries hold in reserve, you never know whether the latter is still full + Pretty design, you can sometimes put on the table (looks like a normal pen with 3 buttons from) + Fits into your pocket + Changing the battery is easy, safety lever up and withdraw pin head - Is not standardized battery of China but in DE available (my I have at Mister Minit get) 23A 12V
