A trackball that operates cursor by rolling the ball with your finger. | Thumb operated type that can be used in a relaxed state without force. The | is an ergonomic shape that fits just by lightly attaching the palm. | 34mm medium size ball just right for thumb movement. | cursor speed can be switched between 4 levels of 600, 800, 1200, and 1600 counts. The left and right button, the wheel (scroll) button, and the count-switching button has a silent switch. This is a wired type that does not require battery replacement. Interface: Compliant with USB HID specification version 1.1, can also be used with USB 3.1/3.0/2.0 interface. Connector shape: USB(A type connector). Reading method: optical sensor

Relay adapter (coupler) for RJ-45 connectors that support Gigabit | Connector: RJ-45 Female | Wiring: Straight full wire | Supported transmission bands: Enhanced Category 5 (1000BASE-T, 100BASE-TX, 10BASE-T) compliant | Size (W x D x H): 0.6 x 1.2 x 0.6 inches (14.5 x 30 x

Interface: USB HID specification version 1.1 compliant | Connector Shape: USB (A type connector) | Number of Keys: 19 keys | Cable length: 0.8m | Size (W x D x H): 3.0 x 4.7 x 0.8 inches (76 x