Wireless Speaker Armband

This is a Bluetooth wireless speaker that attaches to your arm using a velcro strap. I used it to play an instrumental version of "Iron Man" by Black Sabbath for my Iron Man cosplay.

To build this you need:
(6) 4x16mm bolts and nuts
(8) 2x16mm bolts with (12) nuts and (4) washers
(1) DW-CT14+ Bluetooth Module ($7 on Amazon)
(1) 2" Speaker
(1) Small USB Battery
(2) Zip Ties
(1) Short USB-A to USB-B Micro Cable
(1) 2" Velcro Armband