Feature: 1. 【SDR Technology & Multi-Mode Operation】: This transceiver incorporates state-of-the-art Software Defined Radio (SDR) technology, offering versatile operation modes of USB, LSB, CW, AM, and frequency modulation. It features a DSP filter with selectable bandwidths and DSP functions such as AGC, NR, VOX, and ATT, enhancing signal quality and user experience. 2. 【Compact & High-Efficiency Design】: This transceiver is highly portable with its small size and lightweight aluminum housing. It utilizes an EER E-level driven SSB stage for efficient power consumption, delivering a maximum 5W PEP SSB output from a 12 V powersupply without the need for a bulky heatsink, making it perfect for site operation. 3. 【Open-Source Firmware & Customizability】: The device comes with open-source firmware built for the IDE, allowing hobbyists and engineers to experiment, add new functions, and share contributions via GitHub. It supports a community-driven development environment that enhances the transceiver's capabilities and ensures continuous improvement. The software-based VOX can be used as a quick full invasive (QSK and semi-QSK operation) or to assist in running in digital mode (without PTT interface) for RX/TX switching, external PTT output with TX/PA control delay. 4. 【Multi-Band Support & Expandability】: The transceiver provides performance loss from 20kHz to 99MHz and supports continuous tuning over the 160m to 10m frequency band. It includes an FT8 option connector and supports optional accessories such as an audio cable and Morse key, providing flexibility for different operating scenarios. 5. 【User-Friendly & Cost-Effective】: The transceiver is designed for simplicity, reducing installation elements by 50% compared to the initial QCX circuit and eliminating the need for complex transformer windings and alignment procedures. It includes a built-in mic and speaker, and its straightforward setup and operation make it accessible to both amateur radio enthusiasts and seasoned operators. Specification: Name: SDR Transceiver Material: metal Radio frequency output: 5W maximum PEP SSB output power at 12 V exit direct current in Frequency bands: 160m-10m Full mode support: usb, lsb, cw, am, frequency modulation DSP filter: 4000, 2500, 1700, 500, 200, 100, 50Hz passband DSP function: automatic gain control (AGC), noise reduction (NR), voice trigger, voice trigger Xmit (VOX), RX attenuator attenuator (ATT), TX noise gate, TX driver control, volumes control, dBm/S-meter. SSB reverse sideband/carrierwave suppression transmission: better than -45dBc, IMD3 (two tones) -33dBc, reception: better than -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. SSB emitter stage based entirely on digital and software: By controlling the phase of the SI5351 PLL (via the tiny frequency change 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). Noise floor MDS: -135 dBm at 28MHz (in 200Hz BW) Front-end selectivity: steep -45dB/decade roll-off +/-2kHz from tuned-frequency Blocking dynamic ranges: 20kHz offset 123dB, 2kHz offset 78dB CW decoder, Straight/Iambic-A/B keyer Package size: 60 * 60 * 50mm / 2.36 * 2.36 * 1.97in Package weight: 550g / 1.21lb Package List: Packing List (without Morse Key):1 * SDR Transceiver1 * Handheld Microphone OR Packing List (with Morse Key):1 * SDR Transceiver1 * Handheld Microphone1 * Morse Key