Motorola CP110/200, CT250/450, GP300, GTX, P110, P122 , Ear Microphone with PTT Interface. BDN6646 Quantity in Basket: None Code: BDN6646 Price: $414.90 Shipping Weight: 5.00 pounds Suggested List: $461.00 Quantity: Motorola (BDN6646) Ear Microphone with PTT Interface Module. Fits CP-110, CP-150, CP-200, CT250, CT450, GP300, GTX, P110, P1225, SP50 and SP50+.