Accessories4less offers the factory-refurbished Denon Heos 1 Bluetooth Speaker in Black bundled with the Denon Heos 1 Go Battery Pack in Black, model no. HS1, for $99.99 plus $8.99 for shipping. That's $169 under the lowest total price we could find for new units purchased separately elsewhere. The speaker features custom dual drivers, USB, a 3.5mm auxiliary port, 802.11n wireless, Bluetooth, Ethernet, and a humidity-resistant enclosure. The Li-ion rechargeable battery pack features a silicone splashguard and provides up to six hours of playback on a single charge. A 2-year Denon warranty applies.