Poly-Planar VHF Extension Speaker - 8W Surface Mount - Single Black. This Communications Speaker made by Poly-Planar features a stainless steel mounting bracket and a stainless steel grill. The Poly-Planar Vhf Extension Speaker has an 8 watts maximum handling power and comes equipped with a 10 foot lead wire and mini-plug. This Poly-Planar Communication Device can be mounted wherever you need to hear your VHF radio. For a great way to improve the quality of your sound system choose the Poly-Planar Marine Vhf Extension Speaker. Specifications for Poly-Planar VHF Extension Speaker: Manufacturer: Poly-Planar Color: Black Quantity: 1 Additional Features: 8 Watts Size: 3 in Features of Poly-Planar VHF Extension Speaker Watts Max: 16 Watts Mounting Style: Bracket Size: 2.75" QTY: Single Watts RMS: 8 Watts Package Contents: Poly-Planar VHF Extension Speaker Poly-Planar MB21B: VHF Extension Speaker - 8W Surface Mount - Single Black