New addition to the Synergy family. Hearing cap with soft padded headband and comfortable soft hygiene pads for comfortable use throughout the workout. Now you can combine a secure workplace thanks to listening, secure communication via Bluetooth MultiPoint (connect up to two different devices to the covers) connected phones and AM / FM radio. Other audio sources are connected via the external audio input (AUX 3.5 mm). For use in workplaces with medium noise levels The sound from radio, listening & bluetooth is limited to a safe level (82 dB) of EPS (Electronic Protection System) Noise-canceling microphone for better phone calls Supplied with 2xAA rechargeable batteries and chargers Up to 62h use, 3h fast charging in wall socket and 6h via USB socket Weight 459g