You must compete with engine and wind noise if you want to carry on a cell phone conversation while under way.
Cobra Marine's MR F300 BT waterproof handset with Bluetooth wireless technology transmits phone calls loud and clear, according to the company. (Cobra's product recently won a DAME Category Winner award at the 2008 Marine Equipment Trade Show in the marine electronics category.)
MicroBlue features a noise-canceling microphone for clear conversations. Phone calls are easily heard through the unit's speaker when connected to a stereo. Meeting JIS7 standards, Cobra's MR F300 BT withstands full submersion in three feet of water for half an hour, the company says. It's compatible with any Bluetooth-enabled cell phone and connects to a 12V DC power through a waterproof plug. The size of an ordinary handheld microphone, the product carries a retail price of $189.95. Contact: Cobra Electronics, Chicago, (773) 889-8870, www.cobra.com.