This product is new.
---
Mfg. Information:
Patented! World's only unlimited multi-key input membrane keyboard (N key rollover technology).
Support REAL 1000Hz Ultra Polling rate so that users can enjoy and win the game play with the fastest reaction and repeat speed.
Each finger has different key pressure. To realize the ultimate membrane key stroke feeling, ZM-K600S designed the keycaps with 3 different pressure groups.
Single body rubber dome and premium water proof membrane film inside.
Red color special keycaps (8EA) and a changing tool. Human engineering comfortable Palm-rest.
Green production! High Quality! Zalman uses approved RoHS, Green and High Quality parts only.
PS/2 and USB combo interface - The only membrane keyboard supporting the unlimited multi-key input both PS/2 and USB!