Yamaha CM500 LC2 Replacement Lab Headset with Built-in Microphone Features: These headsets are compatible and specific for LC4 and LC3Bse and LC3 EXP kits Lab System * replacement headphones for the YAMAHA Music Lab system only. LC2 LC3 LC4 LAB SYSTEMS Before ordering please contact us to verify compatibility. Headset replacement models are specific to the LAB STATION in use. Compatibility is critical for smooth operation of microphone, call features and listening. Call us for Specific REPLACEMENT MODEL HEADSETS FOR YAMAHA LABS. Piano Solutions is pleased to assist. (317) 582-1946