USB Numeric Keypad Membrane Black RoHS Compliant TK-TCM011BK/RS Web Model Name: ZD-TKTCM011BK Manufacturer: Elecom It has been stored with almost no use. This is a standard type, perfect for use with laptops. Large keys improve input efficiency. Durable keys that can withstand up to 10 million keystrokes are used. Since it's USB connected, you can plug and unplug it even when the computer is on. No need to install special drivers, just plug it into your computer's USB port and it's ready to use. Equipped with a [Tab] key convenient for Excel work and a [00] key convenient for entering numbers. Equipped with an LED lamp that shows the NumLock on/off status at a glance. ■ Interface: USB ■ Connector Shape: USB [A] ■ Compatible Models: Windows PCs equipped with a USB interface ■ Supported OS: Windows 8～8.1, Windows RT～RT8.1, Windows 7(SP1), Windows Vista(SP2), Windows XP(SP3) ■ Key Type: Membrane ■ Key Arrangement: 20 keys ■ Key Pitch: 19mm ■ Key Stroke: 2.3mm ■ Power Supply: USB bus power ■ Cable Length: 0.5m ■ External Dimensions: Width 90 x Depth 140 x Height 23.5mm (excluding cable) ■ Weight: Approximately 110g