Radioddity' s first proprietary radio is designed to meet the most demanding of conditions, and dole out unmatched power while at the same time, being one of the safest, most comfortable radios on the market. This manual is intended to help you find out how to operate the QB-25 more easily and to inform you the detailed specification and features. If you have any problems, please feel free to email support@radioddity.com.Customer means everything to us. Your concerns are our concerns.