ROCKFIRE INTERNATIONAL™ Waterproof Shower Bluetooth Speaker has a great dynamic sound for your Showering Musical Experience!  It uses two suction cups to attach to most Bathroom Tiles or Mirrors.  It's perfect for outdoor use as well. 
 
Product Details:
 
Silicone material
Lightweight and waterproof (IPX4) speaker
Internal rechargeable battery provides up to 2 hours of nonstop music
Suctions on the bottom of the speaker stick to most flat surfaces
Hands-free function with a built-in mic and music controls
Includes a micro USB to USB charging cable
Playback time is up to two hours at max volume
Charging time is 1 hour