Inateck Online via Amazon offers its Inateck Dual-Driver Wireless Bluetooth Speaker in Black, model no. BP2001, for $32.99. Coupon code "EGZ668LM" cuts it to $24.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to get free shipping; otherwise, it costs $6.70.) That's $38 off list and the lowest total price we could find. It features dual 5-watt drivers, up to six hours of playtime on a full charge, microphone, 3.5mm audio jack, and viewing cradle for tablets and smartphones.

Note: There is no volume controller on the speaker, but you can control the volume via your connected device.