These are on deal of the day for $22.49, however there is also a $4 coupon which you can apply to take it down to $18.49. I'm not sure how long the coupon will stay there.
Deal of the Day: $22.49
Ends in 23h 09m 27s
Coupon: $4.00 coupon applied.
Down from $30 according to Camels and the cheapest price yet, even before the $4 coupon.
Battery Life up to 4 hours
Total hours with charging case Up to 20 hours
Sweat & Water Proof IPX4
Magnetic Charging Case