This is a shortwave QRP SSB/ transceiver. It boasts 1602 screen, equipped with charger, -in speaker It can be connected to an automatic key, and can be decoded by .Using BS170 series transmit tube, durable. Can be used by connecting the antenna (BNC socket)8 bands. standing wave digital display External 13.8v maximum 10w TCXO for KDS. Accuracy 0.5PPM (1PPM per year).Port Introduction: - DC 5.5-2.1 ,max 15v,13.8V/3A: External supply port - KEY: automatic key body connection (A, B, single key) - PA: External amplifier, PTT signal - MIC: External microphone port - SPK: External speakerFunction List:Simple, interesting and versatile QRP SSB transceiver with embedded DSP and SDR functions. EER E-level SSB launch stage. 13.8V supply provides about 5W PEP SSB output. Full mode support: USB, LSB, , AM, DSP filter: 4000, 2500, 1700, 500, 200, 100 and 50Hz passbandDSP function: automatic gain control (), noise reduction (), voice trigger, voice trigger Xmit (), attenuator (ATT), TX noise gate, TX driver control, volume control, dBm/S-meterSSB reverse sideband/ suppression transmission: 45dBc, IMD3 (two tones) -33dBc, : -50dBcMulti-band support, continuously adjustable in the 160m-10m frequency band (and performance loss from 20kHz..99MHz)Simple installation modification with 8 component changes and 8 wiresLightweight, low-cost transceiver: Thanks to EER transmitter E-level, it has high efficiency (no bulky heat sink required), and simple design (no need for complex balanced linear amplifiers)SSB transmitter 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 ofPWM) to sample the microphone input and reconstruct the SSB signal. PA key shaping circuit)Fully digital and software-based SDR receiver stage (optional): sample the I/Q (complex) signal from the quadrature sampling detector digital mixer, and a 90-degree phase shift in the software (Hilber transform) and eliminate one by adding sidebandsColour:blackMaterial:Aluminum alloyPackage Contents:1 x Transceiver1 x Handheld MICOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.