ship from Japan Trackball equipped with Bluetooth 4.0 with high energy-saving performance. An ergonomically shaped trackball that fits just by lightly touching the palm of your hand. It is a thumb operation type that can be used in a relaxed state without force. The OMRON switch, which has excellent click feeling and durability, is used for the micro switch that affects operability. [Appropriate language standard]: Bluetooth Ver.4.0 (BLE) [Frequency range]: 2.402 to 2.480GHz [Profile]: HID over GATT [Communication range]: Wooden top plate (on non-magnetic material) / Maximum radius approx. 10 m Steel top plate / Radius approx. 2 m [Resolution]: 1600/1200/800/400 counts / inch [Reading method]: Laser sensor method [Button]: 2 buttons, 2 side buttons, wheel (scroll) button, count switching button