Thanks to Sound Activated Compression (SAC) and a noise reduction rating (NRR) of 23-25 dB, the Cloak Dual Mic Electronic Muffs ensure hearing is always protected. The addition of built-in, high-definition speakers and dual Hi-Gain omnidirectional microphones deliver clear, balanced sounds at safe levels. Easy to fold up and store away in any range bag. Silent, simple-to-operate soft-touch button controls ensure zero distractions. Powered by two AAA batteries (included). Walker's GWPCLKDM Cloak Dual Mic Electronic Muff Over the Head 23-25 dB Black.