Features: Applicable to FT-817/857/897 and etc. The frequency is 22.625MHz, which can improve the stability of the machine after replacing.It is has better working performance. In the actual test, the frequency of the crystal was observed with a high-accuracy frequency meter. After heating up, the temperature-compensated crystal did not change significantly, and the effect was remarkable. The temperature compensation is not used to correct the frequency offset. It is to ensure that the frequency of the machine is always consistent under various temperature environments. The crystal accuracy can reach 0.5PPM, which is consistent with the TCXO-9 module parameters, low price and high cost performance. Specification: Item Type:Compensated Crystal Part Size:3 x 1.2 x 1cm / 1.18 x 0.47 x 0.39in Mounting Method:Turn off the power of the machine, open the cover of the machine, find the position where the temperature compensation crystal is installed. You need to unplug the ordinary crystal of the machine, and then insert it according to the stitching. After installation, you can start using it without any settings. Package List: 1 x TCXO-9 0.5PPM Compensated Crystal Module 1、Applicable to FT-817/857/897 and etc. 2、The frequency is 22.625MHz, which can improve the stability of the machine after replacing.It is has better working performance. 3、In the actual test, the frequency of the crystal was observed with a high-accuracy frequency meter. After heating up, the temperature-compensated crystal did not change significantly, and the effect was remarkable. 4、The temperature compensation is not used to correct the frequency offset. It is to ensure that the frequency of the machine is always consistent under various temperature environments. 5、The crystal accuracy can reach 0.5PPM, which is consistent with the TCXO-9 module parameters, low price and high cost performance.