JBL Go 4 Blue (JBLGO4BLU) is an ultra-portable Bluetooth speaker that delivers JBL Pro Sound with punchy bass despite its compact size. It offers up to 7 hours of playtime (plus 2 extra hours with Playtime Boost). It features IP67 waterproof and dustproof protection. It supports Auracast™ for multi-speaker connection and is made partly from recycled materials. It can be customized using the JBL Portable app.