Plugfones FreeReign series VL earplug headphones. Volume Limiting (VL) model - compliant with OSHA 82 dB max volume guidelines Combines the hearing protection of an earplug with the convenience of earbud type headphones. Featuring SoundSeal noise-suppressing technology to block out environmental noise and protect the wearer in high decibel environments. Bluetooth enabled for wireless wear. NeverOut fast charge battery provides 12 hours of continuous use on a single charge. Noise isolating microphone allows for use with phone or radio.