GN NETCOM Jabra Pro 9470 Replacement Ear and Mouth Piece. Pro 9470 Monaural Over The Ear Wired WL 150-6.80KHZ Semi 492.13Foot. Mono - Wired/Wireless - DECT - 150 Hz - 6.80 kHz - Over-The-Head, Behind-The-Neck, Over-The-Ear - Monaural - Semi-Open - 492.13 Foot Cable (No Headband) Single Earpiece Extra Headset Supports Wideband VoIP Phones PeakStop Technology Compatible with Bluetooth Enabled Cell Phones & Wireless Headsets Digital Signal Processing Technology Enriches Sound Quality