Compared to the 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 upgrades, out of , can be used as a template for DIY upgrade learningQuickly 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. PCB layout in line with high frequency circuit principles to 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, , , , and so on.Colour: blackMaterial: aluminum alloyVoltage: AC100-240VPackage Contents:1 * Transceiver1 * Microphone1 * EU charger4 * Machine FeetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.