Cardo Scala 2.5mm Works with all Non-Bluetooth enabled cell phone models using a universal style 2.5 mm audio jack via the included Bluetooth transceiver module. Works with any NON-Bluetooth 2.5 mm Headset compatible cellular phone. Exchangeable Ear-Loop and Eye-glass/ Sunglasses Attachment make for a very comfortable wearing experience. The Answer/ End button lets you take and make calls, reject calls, redial, and voice-dial if your cell phone supports these functions. Factory original one year warranty applies.