Ends 10/11 at 10PM PT. Sellout.woot! has the Howard Leight R-01526 Impact Sport Electronic Earmuff for $30 with free shipping for Prime members or $6 shipping. Noise Reduction Rating (NRR): 22

Features external audio input which connects to MP3 players and scanners, automatic 4 hour shut-off and volume control knob for amplifying conversation and commands. Includes 2 AAA batteries (350 hours).