33-key numeric keypad and made of black silicone flexible, roll-up and waterproof. USB based keyboard but also supplied with a USB to PS2 adapter (adapter USB Type A Female to 6-pin mini-DIN male). Completely sealed, no screws, giving it greater resistance to external attacks, including certain acids. Water resistance level type IP67. It has 33 keys membrane consiguen maximum comfort in every key touch. Lifecycle of 10 million keystrokes. Displayed size of 160 x 135 x 8 mm. Available in different colors to special order quantities. Integrated retractable USB cable 75 cm in length.