Usdr usdx+ Plus 8 Band SDR Full Mode HF Ham Radio SSB QRP Transceiver UpgradeNote: This product has no power source. It needs to be equipped by the user. Make sure you don't mind before buying! ! ! The power interface is 5. 5mm, the power supply voltage is 12. 6V, 1A 2A can be used. You can buy a power supply according to the above values, thank you. Description: This is a shortwave QRP SSB CW transceiver. The ultra small size is easy to carry for outdoor use. It has a built in 4000mAh lithium battery, uses a 1602N LCD screen,