Replacement pack only contains a single sensor clamp complete with Bluetooth module sockets. Replacement Bluetooth ChassisEAR Single Sensor Clamp. Compatible with both the 78684 Bluetooth ChassisEAR and 78752 Bluetooth ChassisEAR Lite.This specially designed clamp incorporates a piezoelectric microphone that picks up vibrations and noises which can then be transmitted to a device via an attached Bluetooth module (sold separately).
Includes: Medium Serrated Hone, Coarse Hone, Medium Hone, Fine Hone, Ultra-Fine HoneThe Ultimate in Sharpening Systems TechnologySafe, Easy and Convenient to Use..