Aluminium Metal Speaker with Microphone, Bt Transmission & Tf Card Reader, 3W_&_4 Power & Autonomy Up to 3H. Functions: Answering Calls, Volume Control, Connection to Mobile Devices Playlist & FM Radio. This Product Includes USB Cable for Charger & is Supplied in a Gift Box. Ø71 x 42 Mm | Box: 80 x 80 x 60 Mm; Certificates Available: Msds, Red Minimum Quantity: 1