J11 Portable Bluetooth SpeakerJ11 Portable Wireless Bluetooth Speaker; Splashproof Speaker Bluetooth L2CAP/A2DP(AVCTP/AVDTP/AVRCP), can receive an AUDIO signal and control the AUDIO device Support HSP/HFP (Handsfree profile), Built-in Mic for hands-free phone call comes with a unique wireless stereo mode that lets you connect two speakers together that elevates not just sound but the overall music listening experience as well.