Portable bluetooth audio receiver. With this device you can convert any type of headset to wireless headphones. No more annoying cables while using your cell phone. To build it, few extra components are needed: -1 Bluetooth module -3 AAA battery -4 3mm Leds -2 screws for plastic diameter 3mm -1 "Sheet Leaf Tab" for the battery holder contacts (see the pic) -1 elastic cord 3mm x 10cm -Some wires -1 slide switch If you have any questions, leave a comment or just send me a message