OTS Single SideBand 2010 Transceiver: Aquacom Professional singled sideband transceiver (voice menu) Includes SP8, an AA 8-cell battery holder, voice activated (VOX), Squelch, Ear volumes, carrying case and user's manual Multichannel: 4 channels Choice between voice activated (VOX) and Push-To-Talk (PTT) controls Adjustable underwater