... & ear hair trimmer 1. one AAA battery supply power 2.12 x 1.5cm size 3.nose hair clipper ... heads, and no damage to the nasal cavity.2. Open slot, you can capture any direction of the long ... , the head is not repair steel bonnet / key to open / back cover is black, with a lid, a small brush. ... (Very nice, comfortable feel)Mode of operation: Open the back cover, put into a AA battery, push the key ...