Suzhou Youpin Electronic Co.Ltd is 4 channels manufacturers and suppliers in China who can wholesale 4 channels. We can provide professional service and better price for you. If you interested in 4 channels products, please contact with us. Tips: Special needs, for example: OEM, ODM, customized according to demands, design and others, please email us and tell us detail needs. We follow the quality of rest assured that the price of conscience, dedicated service.