This product belongs to Class CBD Device, with the cell capacity of 350mah and output voltage of 3.4-3.7-4.0V. It is preheated twice and regulated three times. The specification is 10.5/11.2 * 87mm, and the single weight is 16g. The charging method is the bottom Type-c cable charging. The color is electroplating gold and baking varnish. Other colors: black, white, silver. The colors can be customized according to the customer OEM.