The C1025 was created as a successor to the C860 and has been discontinued for a few years. The C1025 shares many components with the C960 & C860 such as the battery charger, batteries and programming cable. ESS still services the C860 & C1025 with 3M OEM parts, but some parts have been discontinued, so there is limited availability.
PAR Documentation
PDF files for the PAR C1025
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C960/C1025/C860 Programming Instructions
Program instructions if you hear static, have trouble hearing or talking. You must also reprogram if you have changed your channels.