NIB - Features & details • [Scientific Ergonomic Lightweight Design) Use DAREU unique vertical mouse to place your hand in a natural handshake position to prevent forearm twisting and muscle strain reduction. 117*75*67.5mm, 89g(not include cable) • (Comfortable Hand Feeling) The surface of the vertical mouse is made very smooth and sweat-proof after special treatment by DAREU, preventing slippery hands after prolonged use. • (Unique Wing Tail Bionic Tray Design) Firstly, DAREU unique Wing Tail Bionic Tray can carry the weight of hand, avoid the inability of hand to receive force in the air and increase the pressure on the arm. Secondly, it can reduce the friction between the palm of hand and desktop, thereby reducing the pain. Finally, the specially designed feathery stripes on the tray can be non-slip. • [Blue Parrot Theme Design) Being in a wonderful forest world, where it is colorful, free, comfortable, leisure and carefree, blue parrot is combing itself feathers. Let people forget all troubles and fatigue, and release themselves to the fullest! Questions? Leave a comment below!