Standard Horizon SSM-64A VOX Headset Standard Horizon SSM-64A VOX Headset Standard Horizon;s SSM-64A offers an Over the head headset with Boom mic, option to setup for PTT (Push to Talk) operation or VOX (voice activated transmit). Compatible will all Standard Horizon models with a speaker mic connection on the radio. SKUSTXSSM64A MAN#SSM-64A ID#: 6123 Our Price: $69.95 Availability: In Stock Shipping: FREE Ground Shipping! Condition: Brand New Add to cart We’re sorry for the inconvenience, but please know we are working hard to replenish stock and fill backorders. Global shipping constraints and other material shortages have slowed the supply of products in many industries, including GPS and Marine electronics. We update the Estimated Shipping Date on our website in real time, so feel free to check back frequently. Thank You for your patience and for shopping with The GPS Store, Inc.