PartyBox 300 is the most legit portable speaker on the market for those who want professional level/quality sound and multiple input options. This thing can be used indoors for a wedding with
JBL PartyBox 300 Portable Bluetooth® speaker with light display at Crutchfield
JBL Partybox Bluetooth Speaker - U&I Creative Wedding Planning
The JBL PartyBox 300 Review: Your Party's Ultimate Music Machine | GearDiary
JBL PartyBox 300 | Battery-powered portable Bluetooth party speaker with light effects