Helps provide hearing protection while improving situational awareness and communication. Small, lightweight and rechargeable. Charging contacts recharge the unit while in the case, using three AA alkaline batteries; USB port in case charges earplugs when plugged into a computer or wall socket. Li-ion battery provides up to 16 hours of continuous operation. Intuitive one-button operation turns unit on, off and selects volume settings (2). Replaceable communications eartip. Water resistant. Microphone port helps reduce wind noise. Attachment point for optional earplug cord, which is included.