Configuration: Klein Wired PTT Headsets for Sonim - Signal Pro Split-Wire Surveillance EarpieceThe Klein Medium Duty Two-Wire Surveillance Kit with Pro Series High-Noise Speaker is ideal for high noise areas. Split-wire design includes durable microphone/PTT button housing with swivel steel clothing clip. Featuring a clear acoustic tube, this low-profile earpiece can be worn in either ear. This PTT earpiece is compatible with Sonim XP Strike and 5560. Includes earpiece, extra eartip, and user guide.