MR F300 BTCommunicate Loud & ClearKeep Your Mobile Phone Safe & DryTalk on your Bluetooth® enabled mobile phone using Cobra's wateproof handset with exclusive MicroBlue technologyMicroBlue TechnologyBluetooth Wireless Technology in a unique noise canceling handset design.Noise Canceling MicrophoneExclusive Noise Muting Technology for crystal clear communications. Loud and Clear incoming audio. Phone calls are heard through the unit's powerful speaker.How it Works