Dule mode volume adjustment (rotary knob and button). Automatic compatible with 12.6V and 8.4V battery. Item location is at China, and we do cross air express.
Please see below table to find details service level. So, my friend, please wait your item patiently. If you have any other.We are a professional worldwide wholesale company. High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. Feedback is very important to us. We will do our best to solve your problem as soon as possible. Thank you for your visit and welcome back. We will reply you ASAP. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem.