Size: black single button easy operation stable performance and convenient this little gadget is a must have for any artist an efficient way to mix colors together this device uses disposable mixing sticks which are sanitary and cost effective specification: material: plastic color: black size: approx. 5.121.77inch/134.5cm power: 2 aa 1.5v batteries are need (not included in the package) package included: 1 x ink mixer