Motorola PMMN4044, IP57 Rated, Volume Switch Speaker Microphone for HT750, HT1250, HT1550, MTX850, M Quantity in Basket: None Code: PMMN4044 Price: $93.50 Shipping Weight: 2.00 pounds Quantity: Motorola PMMN4044, Remote Speaker Microphone with IP57 Rating (Submersible), Hi/Low Volume Switch, Coiled Cord, Swivel Spring Clip, Intrinsically Safe. Fits HT750, HT1250, HT1250LS, HT1250LS+, HT1550XLS, MTX850, MTX8250, MTX950 & MTX9250 Handhelds.