Medusa created by GeekVape. is one of the best designs Geekvape has come up with.  It is a new generation RDTA with simplified inner structure, making assemble and refill extremely simple.
While the Medusa looks like an ordinary RDA, it can also be used as an RDTA that can hold up to 3ml of e-juice.   To refill as an RDTA, you conveniently unscrew the shaft section to reveal the e-juice reservoir.  Or, you can drip thru the mouthpiece as you would with any ordinary RDA.
The Medusa RDTA measures 24mm x 38mm and has an outside diameter of 25mm to give it a compact form factor.  The design is streamlined with laser etching to create an elegant look.  There’s  a standard 510 connection at the bottom that is made with a gold plated pin for best electrical conduction.
Adjustable airflow is located on the side and utilizes 2 x dual air holes.  The  shaft section of the RDTA is  shorter than similar devices to ensure an increase in flavor production.