Sony XS-XB6941 4-Way Speaker (Black)

Long Battery Life : Battery life up to 16 hours for long listening hours
Extra Bass : Get things going with EXTRA BASS. A passive radiator works with the mono speaker to enhance low-end tones, giving bass a boost despite the compact size
Totally waterproof : With an IP67 rating, the speaker can survive being dropped in water, so the odd rain shower or accidental spillage won’t pose any problems.
Totally dustproof : Thanks to the IP67 rating, you can take your speaker to the pool or wherever you like. The speaker will keep on playing, no matter how dusty the surface.
Built-In Mic : Built-in mic for hands free calling
Usage : Supplied detachable strap for easy ususage
Small and light design : The SRS-XB12 is compact, wireless and made to go with you anywhere. With a detachable strap you can easily hang it up and keep your music going on the move.

Peak Power 270W, 75W(RMS), Frequency Response: 67Hz-21kHz
Advanced Non Magnetic FRP frames
Carbon Injected Plus One Cones
External Diameter (in): 6-7/8, Mounting Depth (in): 2-1/16

HOP aramid cone woofer for rich bass and clear vocals
High power handling with 210 W max out and 30 W rated out
Balanced dome tweeter for clear, broad frequency range
Ideally designed for Sony head units with Mega Bass circuitry
Space-saving, easy-to-install design