Christina is checking out the Dream Machines DM6 Holey S. It's a lightweight ergonomic design, with the pmw 3389 sensor and Huano switches. Priced around £40 here in the UK, is this worth buying?

In this paper, a bandpass FSS combining two-dimensional (2D) planar structure and three-dimensional (3D) structure is proposed. Each unit consists of three layers: the up-per and lower layers are ...