Steelman Pro 78684 Bluetooth ChassisEAR Kit NO WIRES - Bluetooth connected transmitters attach to clamps and wirelessly transmits data to a connected device 4 INDEPENDENT SENSORS - Kit includes 4 vibration and noise sensor clamps and 4 Bluetooth transmitters with a set of color coded silicone rubber boots STETHOSCOPE PROBE - Aluminum probe works with a Bluetooth transmitter as an electronic stethoscope and features a detachable sound wand USB BLUETOOTH DONGLE - Includes a USB Bluetooth dongle for use with laptop PCs that do not have built-in Bluetooth capability MULTIFUNCTION DOCK - Docking station charges Bluetooth modules and includes storage compartments for clamps, sound wand, and ties PADDED HEADPHONES - Comfort-fit padded headphones provide high-quality sound reproduction for diagnosing detected noises FREE SOFTWARE - Free downloadable software from STEELMANPRO.com and Google Play and works with Windows 7, 8, and 10 and a range of Android devices