Cheap And Discounts Customized Bias Frequency TCXO Temperature Compensated Crystal Oscillator 27.1791MHZ, 39.4971MHZ Other Frequencies Can Be Custom Wholesale. Buy Directly From Merchant Electron Accessory Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.