This pair of OontZ Angle 3 Pro bluetooth speakers are rated very highly in reviews, even above speakers costing twice as much! They get the donor's personal recommendation, as well!

With a 21-watt digital amp and a 100 foot wireless range, you can turn them up and still get clear sound while you party the night away!

Waterproof (IP66) and with a 5-foot cord, each speaker is 9.25"L x 3.5"H, so they can go both inside and out!