Maybe the most excellent 10M clock at that price, including Rubidium clock, even the Mutec based upon OCXO. Parameters look great, and so does the sound. All jitter under 20fs since 1Hz. Phase noise less than -116dB at 1Hz, less than -146dB at 10Hz and less than -160dB at 100Hz. What a great condition more than any words. And it has an excellent performance combined use with Tascam CG-1000 and Mutec iClock.