Product Details The 3M™ PELTOR™ ProTac™ III hearing protector helps safeguard against harmful noise, whilst allowing ambient sounds to be heard at a level below 82dB. This attribute increases your situation awareness and ability to communicate with nearby colleagues, as well as hearing warning signals, approaching vehicles or sounds produced by machines and industrial processes. ~ Built-in level-dependent function allows the wearer to hear ambient sounds, such as conversations, machine sounds and warning signals ~ 3.5 mm listen-only stereo input (limited to 82 dB) for connection to external devices (e.g. mobile phone, radio, two-way radio and iPod) ~ Voice-guided menu system avoids the need to remove the headset for setting changes ~ Auto power off turns headset off after 4 hours of non-use, to save energy and a low-battery warning informs you when to change batteries ~ To reduce the corrosion caused by sweat the electronics are located in the outer part of the cup Specifications Battery Life: 100 Hours Battery Type: AA Brand: PELTOR™ Colour: Black Communication Type: Environmental listening Features: Impulse Noise Protection, Level Dependant Function Hearing Protection Style: Earmuffs Hearing Protection Type: Headband Intrinsically Safe: No Product Type: Protective Hearing SLC80 Rating: 26 dB (Class 5)