ConnecTunes : Wireless "Pairing" to Cell Phones/MP3s. Send/Receive phone calls, listen to your favorite playlist or radio station while in a noisy environment! Product Features: ~Electronic ear muff with wireless synchronization capabilities. Easy to Send and Receive calls with a touch of a button. Sync-up to your MP3 player and listen to your favorite playlist. Listen to your AM/FM Stereo that provides the highest quality reception and sound clarity. Built-in microphone is noise canceling and mounted on a flexible boom for superior, clear sound quality. Great for noisy environments, providing hearing protection of 22 NRR / 27 SNR. Internal Sound Limiting less than 82 DB. Never Miss An Important Call !!~Pairing range of 10ft (3 meters). Range may be higher depending on environment. Replace batteries every 2 or 4 woks depending on usage. Unit uses incl. 2 AA alkaline batteries.~4 hour auto-shut off, unit turns off after 4 hours in case you forget. Replace batteries with NiMH rechargeable batteries to convert to rechargeable system. Built-in micro USB charger port. Low force, fork-type stainless steel headband, provides consistent and lowest pressure to wearer's head at all temperatures. Padded headband, low headband pressure and soft ear cushions for all day use.~3.5mm aux jack connects to most audio devices.~22 NRR / 27 SNR rated for hearing protection. Available in cap mount version also.