Providing the perfect balance of great sound, iconic design, and premium materials, the Onyx Studio 4 is the epitome of room-filling audio. Crafted to be the best sounding, full featured, portable Bluetooth speaker in its class, the Onyx Studio 4 offers two device connections, 8 hours of playtime and Harman Kardon Connect+, which allows you to connect 100+ speakers with the same feature with the touch of a button. Rounding out the Onyx Studio 4 offerings is a built-in microphone with Voicelogic, echo and noise cancellation for crystal-clear conferencing over the speaker. Stream music wirelessly via Bluetooth to enjoy room-filling sound. Connect up to 2 smart devices at the same time and take turns playing music. The rechargeable battery supports up to 8 hours of playtime. Amplify your listening experience by wirelessly connecting more than 100 HK Connect+ enabled speakers. Colour: Blue