Check the listing for details. YAESU TCXO-4 Compatible High-Stability Crystal Module FT-840 FT-1000MP FRG-100. Color: Green/Gold, Condition: New. Listed at 69.95 USD. HVR-TEK's Yaesu TCXO-4 Compatible Temperature-Compensated Crystal Oscillator ModuleDesigned, Built, and Shipped from Bolton, CT, USA by an Extra-Class Ham (KA1HVR)For Yaesu FT-840, FT-1000MP, and FRG-100Drop-in compatible with Yaesu 10.485760 MHz TCXO-4 ModulePre-calibrated, Temperature-compensated for stable operation20x better Frequency Stability than Yaesu's (0.1ppm vs 2ppm)Great for digital modes: FST4, FT4, FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, WSPR, FST4W, etc.On-board Low Drop Out 5.0V Voltage Regulator with additional filtering capacitors Great replacement for erratic/failed "OSC-UNIT/F3392102" (blinking display due to unlocked PLL)No soldering requiredShips from US in rigid cardboard box to protect it during transit *** IN NO WAY IS THIS ITEM ASSOCIATED WITH ANY OTHER EBAY SELLER LISTINGS, WHICH MAY HAVE COPIED MY LANGUAGE OR IMAGES. *** NOTE REGARDING FT-1000MP: This TCXO is NOT compatible with the “MARK V” version. It works fine with original (Non MARK V) version which has a “REF UNIT” board with an empty “TCXO-4 OPTION” space.