Compared to the old usdx, the new usdx+ updates are as follows: Moved the headphone and power key/microphone jacks to the front panel for easy access to the headphone and power button. Move the keys to the bottom of the LCD screen for a larger touch area and a more comfortable keystroke experience. Upgraded built-in speaker effects, double the sound! PCB reserved pads for various upgrades, out of , can be used as a template for DIY upgrade learning Quickly change qrp cw frequency. Support cw sidetone volume adjustment. Support cw sidetone adjustment. This is a short wave qrp ssb/cw transceiver. The ultra-small size is easy to carry for outdoor use, built-in 4000mAh lithium battery, 1602n LCD screen, built-in speaker, supports connecting to a computer and using FT8, JS8, FT4 and other mode software to control digital, and supports cw automatic decoding. 8 tracks covering 80m/60m/40m/30m/20m/17m/15m/10m. Excellent PCB layout line with high frequency circuit design principles to excellent performance. Whether using the built-in battery or an external 13.8v power supply, it can reach 8 gears of 3-5w power, and reserve the necessary sot-223 and to-220 pack pads for upgrades. High emission efficiency, the efficiency of 80m/60m/40m/30m/20m is 80%, the efficiency of 17m is 70%, and the efficiency of 15m/10m is 60%. KDS high-precision tcxo brand, frequency accuracy 1ppm, frequency stability 0.5ppm. Ultra-small size: 83x38x124mm (excluding protruding parts). interfaces (, ptt out, mic/key, k-head mic). All parts use 100v c0g/np0 capacitors. Use magnetic latching relays. Use lower noise op amp chip than lm4562. Built-in speaker with cavity. Built-in 11.1v (12.6v) lithium battery. bnc antenna interface. Plug Type: EU Plug, it applies to Indonesia, Germany, France, , Italy and so on. Colour: black Material: aluminum alloy Voltage: AC100-240V Package Contents: 1 * Transceiver 1 * Microphone 1 * EU charger 4 * Machine Feet 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.