1. Added an adjustable attention module in the high-frequency path, with an adjustable range from 0 to -31.5 dB. 2. Changed the RX888's fixed low-noise amplifier to a VGA model with a gain range of -10 dB to +33 dB. The VGA model is suitable for both the high-frequency and very high-frequency bands. 3. Used the next-generation R828D tuner chip instead of the R820T2. 4. Used an enhanced 64MHz low-pass filter to further improve image suppression. 5. A jumper allows selection of either an internal reference clock or an external 27MHz reference clock. 1. LTC2208 16-bit ADC, 130 MSPS sampling rate 2. Dual RF inputs, HF frequency range: 1kHz - 64MHz, maximum real-time bandwidth 64MHz. VHF frequency range: 64MHz - 1700MHz, maximum real-time bandwidth 10MHz. 3. 0.5ppm voltage-controlled oscillator 4. ATT adjustment range: -32dB to 0dB 5. VGA adjustment range: -11dB to +34dB 6. External 27MHz reference clock support 7. 3.3V software-controlled bias tee for independent HF/VHF adjustment 8. ADC PGA random jitter software control 9. Supports mainstream SDR software. Suitable for HDSDR, for SDRConsole, for SDR#, and for SDR++. Color: Black Material: Aluminum Alloy Package Contents: 1 x RX-888 MKII SDR Radio Receiver 1 x USB Cable