Quantity   Component name
1 × DFRobot Bluno Beetle Arduino compatible microcontroller with built-in Bluetooth LE
4 × 9g Micro Servos Any servo will work, but I like the metal gear micro servos made by Arcbotics.
1 × Eneloop Battery Booster Other 5V mobile battery boosters will work too.
1 × Android Smart Phone The STLs are designed for a Nexus 5, but a Samsung S3 will fit too.
1 × Set of 3D printed parts! Details here: <a target="_blank" rel="noopener noreferrer" href="http://www.thingiverse.com/thing:990950">http://www.thingiverse.com/thing:990950</a>