Function: 1. Remove the headphones and the power buttonmicrophone jack to the front panel, convenient to connect the headset and the power button 2. Move the keys to the bottom of the LCD screen for a larger touch area and a more comfortable keystroke experience 3. Upgrade the built-in speakers to double the sound 4. PCB to reserve a variety of upgrades required pad, out of the box, can be used as a DIY upgrade learning template 5. Change the QRP CW frequency quickly 6. Support CW side volume adjustment 7. Support CW side tones 8. This is a shortwave QRP SSBCW transceiver. Ultra-small size for portable outdoor use, (with batteries and no batteries optional, built-in 4000MAH lithium battery)1602n LCD screen, built-in speakers, support to connect computers using FT8, JS8, FT4 and other mode software control digital, support CW automatic decoding Features: 1. 8 tracks covering 80M60m40m30M20m17M15m10m 2. PCB layout design in line with high frequency circuit design principles to ensure excellent performance 3. Both built-in Battery and external 13.8v power supply, can achieve 8-stop 3-5w power, and reserve the necessary sot-223 and To-220 pack pad for upgrading 4. High launch efficiency 7. KDS high precision tcxo brand, frequency accuracy above 1ppm, frequency stability above 0.5ppm 8. Ultra-small size: 88x39x124mm (without bulge) 9. Rich interfaces (cat, ptt out, mickey, k-head mic) 10. All LPF components use 100v c0gnp0 capacitors 11. Using op-amp chips are lower than those of lm4562 noise 12. A built-in speaker with a cavity 13. BNC antenna interface Explanation: 1. Support full mode: usblsbcwamfm (ssb mode reception effect is good, but the transfer effect is poor. AM and FM mode is free, the effect is not good) 2. Filter DSP filter: 4000,2500,1700,500,200,100,50 Hz passband 3. Function DSP function: automatic gain control (AGC) , noise reduction (NR) , XMIT Voice Trigg