This is a shortwave QRP SSB/CW ceiver. It boasts 1602 screen, built-in mic, built-in speaker! It can be connected to an automatic key, and can be decoded by CW. Using IRF series launch tube, . Can be used by connecting the antenna (BNC connector) 3 bands. Power standing wave digital display! Aluminum shell laser marking. Simple, interesting and versatile QRP SSB HF ceiver with embedded and SDR functions.EER E-level driven SSB launch stage. 12V power supply provides about 5W Max PEP SSB output. Full mode support: USB, LSB, CW, AM, FM. filter: 4000, 2500, 1700, 500, 200, 100, 50Hz passband. function: automatic gain control (AGC), noise reduction (), voice trigger, voice trigger Xmit (), RX attenuator attenuator (ATT), TX noise gate, TX driver control, volume control, dBm/S-meter. SSB reverse sideband/carrier suppression mission: -45dBc, IMD3 (two tones) -33dBc, reception: -50dBc. Multi-band support, continuously adjustable in the 160m-10m frequency band (and performance loss from 20kHz to 99MHz). Open source firmware, built in for IDE; allows experimentation, can add new functions, can share contributions through Github, software complexity: 2000 lines of code. Software-based can be used as a fast full invasive (QSK and semi-QSK operation), or to assist in running in digital mode (without CAT or PTT interface) for RX/TX switching, external PTT output with TX/PA control-delay. Simple installation modification with 8 component changes and 8 wires. , low-cost ceiver: Thanks to EER mitter E-level, it has high power efficiency (no bulky heat sink required), and simple design (no need for complex balanced linear power amplifiers). SSB mitter stage based entirely on digital and software: By controlling the phase of the SI5351 PLL (via the tiny frequency of I2C over 800kbit/s) and the amplitude of the PA (via the PWM of PWM) to sample the microphone input and reconstruct the SSB signal. PA key shaping circuit). Fully d