Amazon.com: Songhe HC05 HC 05 Bluetooth Module RF Wireless Bluetooth Transceiver Module 6 Pins for Arduino (2PCS) : Electronics
DIY Bluetooth Headphones V2.0 (Improved) : 5 Steps - Instructables
How to Make a Crazy Solar Bluetooth Headset Thingy #WearableWednesday #tech #DIY #solar « Adafruit Industries – Makers, hackers, artists, designers and engineers!