TechRabbit offers the Samsung Gear Circle Bluetooth Sweat-Resistant Fitness Headset with Microphone in Black, model no. SM-R130NZKSXAR, for $54.99. Coupon code "DNWSCIRCLE39" cuts it to $39.99. Also, free shipping applies. This stereo headset features up to nine hours of continuous playback, sweat resistance, and voice command support. Limit three per customer. Offer ends September 1.