Analog cursor which makes your positioning click more precise.2.4G transmission up to 10m. Plug and play, and free from installing driver. Specially designed for Android system to realize human-computer interactions comprehensively. Applicable to: Smart TV, Android TV box, mini PC, HTPC. Supports System: Linux, Android 2.x, Android 4.x, Win 2000, Win vista, Win7 32, Win7 64, Win8 32, Win8 64, . Instructions: The usb receiver into the computer usb interface. Wait for the computer to automatically download and install a good driver to use. Product Name: Remote Control Material: Plastic + Silicone Color: Black Size: 135 x 37 x 14.7mm/5.31 x 1.46 x 0.58 inch (.) Power Supply: 2 x AAA batteries (not included) nterface: USB 2.0 Bluetooth Version: No Wireless or Wired: 2.4G Wireless Back-lit: No Operation Distance: 10m Key Force: Soft Quantity: 2 Set (other accessories demo in the picture is not included) Package Contents: 2 X Remote Control (not including the battery) 2 X USB Receiver Please Note: This version does not support voice capabilities. Transition: 1cm=10mm=0.39inch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.