The unit operates off an internal Lithium battery and charges by micro-USB. Operation could not be easier. Hold in the button and the screwdriver starts. It is also reverse-able, obviously. Direction is controlled by rotating the screwdriver while holding the button.
When plugged into USB on your computer, you can download and replace the firmware by entering DFU mode, instructions are provided in English and Chinese.
Here are relevant Banggood links (now working):
There are a few variations on the ES120/121 and these include pearl finish instead of steel and a variation with several screwdriver bits instead of the two that came with mine. However I just happen to have an Aldi-supplied PowerFix set which includes 30 such bits.
The ES120 features an OLED screen and USB input on the top of the body. It has somasensory turning, is well presented, comes with cleaning cloth has a weight of around 130m, a built-in single cell lithium battery and comes with 4mm hexagon bits (2 supplied in my version). No-load maximum speed is 170r/min.
All in all a nice little gadget, would make a nice Christmas or birthday present for the DIY type. Comes complete with bits, instructions and rugged case. Minus the case, this tiny, metal, electric screwdriver would not look out of place in any decent tool pouch.
For more information visit the Banggood links above.
As I’m writing, this might prove interesting, I don’t know how long it will be valid: Banggood currently offer up to 70% tools discount. https://goo.gl/su1tYj When this becomes out of date I’ll try to remember to remove this para.