Vertex/Standard MH-34B4B, Light Duty Speaker Microphone for VX-10, VX-300 Quantity in Basket: None Code: MH34B4B Price: $32.30 Shipping Weight: 2.00 pounds Quantity: Vertex/Standard MH-34B4B Speaker Microphone, Light Duty. Fits VX-10 and VX-300 Handhelds.