The Both Hands Cajon POR85 is a model of cajon, a box-shaped percussion instrument, specifically identified as the Almaster Plus. It is manufactured by Both Hands Cajon, a company that specializes in designing and producing various cajon models.
Key features of the POR85 Almaster Plus cajon include: 
- Powerful bass: It features a larger body than other models, designed to produce a powerful bass sound.
- Dual playing panels: The cajon has playing panels on both the front and back, including a “Bongo panel” on the back for additional sound options.
- Trapezoidal resonance chamber: The resonance chamber is designed in a trapezoid shape to form an air vortex, resulting in a softer timbre.
- Steel string design: It features a simple steel string system that is easy to tune.
- Flamenco effects: The steel strings produce a clear flamenco sound effect.
- Hand-sanded edges: The edges are hand-sanded for a more comfortable playing experience.