Compared to the old USDX, the USDX+ features the following updates:The headphone and power/microphone jacks have been moved to the front panel, making it easier to connect headphones and the power button. The buttons have been moved to the bottom of the LCD screen for a larger touch area and a more comfortable keystroke experience. The built-in speaker has been upgraded to double the sound! The PCB includes solder pads for various upgrades, ready to use out of the box, and can serve as a template for DIY upgrades. Quickly change the QRP/CW frequency.Supports CW sidetone volume adjustment.Supports CW sidetone adjustment. This is a shortwave QRP/SSB/CW transceiver. Its ultra-compact size makes it easy to carry and use outdoors. It features a 1602n LCD screen, a built-in speaker, and supports computer control using software in FT8, JS8, FT4, and other modes. It also supports automatic CW decoding. 8 channels covering 80m/60m/40m/30m/20m/17m/15m/10m. Excellent PCB layout design, in line with high-frequency circuit design principles, ensures superior performance. + High transmission efficiency: Greater than 80% at 80m/60m/40m/30m/20m, Greater than 70% at 17m, and Greater than 60% at 15m/10m. Comprehensive connectors (CAT, PTT out, mic/key, K-head mic). All LPF components use 100V C0G/NP0 capacitors. Uses for Omron magnetic latching relays. Uses op amps with lower noise than the LM4562. Built-in speaker with cavity. BNC antenna interface. Voltage: AC220V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Color: Black Material: Metal Package Contents: 1 x Shortwave transceiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.