This is the OTS PowerCom 3000S 4 CH 25 Watt Surface Station Features: Increased power & range (25 watts & up to 3000 meter range) Included rechargeable lithium-ion battery and charger Greatly improved battery life New smaller, lighter and tougher housing New multi-color LED battery indicator New transducer cage New push on/off squelch button IP66 water rated handheld microphone Removable lid with removable whiteboard Battery life (10% duty cycle): 16 hours (1 battery) Included custom OTS backpack to store complete unit and up to 4 diver units Weight/Dimensions: 9.2 lbs / 5.5" x 14" x 10" The all new POWERCOM Surface Station line takes wireless communication performance to the next level for all your professional diving needs. With the POWERCOM&&';;s all-new Scrambler Mode, wireless communications can now be discreetly and more securely transmitted for the first time in wireless communication history. Surface Stations are housed in a completely new smaller, lighter and more rugged case with removable lid. The POWERCOM 3000S offers many new features such as a transducer cage to help protect from bumps and drops, a new IP66 water rated hand held microphone, and an included custom backpack to haul all of your team&&';;s communication gear in one convenient location. The POWERCOM Surface Stations are truly the next generation of subsurface Wireless Communications. PowerCom / MilCom Wireless Communications Brochure Powercom Surface Station User Manual