Bluetooth protocol support: HFPV1.5, A2DPV1.2, AVRCPV1.4, HSP1.2, GAVDP1.2, IOP. Power supply: DC 5V 2A power supply with AC adapter 110V240V. Mounting and connections: Framemounted springloaded clamps provide secure, lownoise connections and easy installation. Bluetooth performance: Built in Bluetooth for wireless music streaming, works with almost all Bluetooth devices, Android devices, smartphones, iPads, tablets, etc. Use scenarios In car audio system: pair with a smartphone to stream music and enable hands calling through the car speakers. In home or office setup: connect to a receiver or active speakers to stream audio from phones, tablets or computers without cables. DIY or mounted frame applications: use the spring loaded clamps for secure mounting in equipment racks or panels to enable convenient wireless audio streaming.