Sunvalleytek via Amazon offers Prime members the Taotronics Pulse X 14-watt Bluetooth Speaker, model no. TT-SK10, for $15.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $9.22.) That's $40 off list and the lowest total price we could find. It features a 14-watt output, audio playback from up to 33 feet, eight hours of play time per charge, microphone, and 3.5mm auxiliary jack.