ProtoArc Vertical Wireless Trackball Mouse, EM05 NL Bluetooth Ergonomic Rollerball Mouse Rechargeable Computer Laptop Thumb Mice, 3 Device Connection, Compatible with iPad, Mac, Windows, PC-Blue No Restock or group activities requiring multiple

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ProtoArc Vertical Wireless Trackball Mouse, EM05 NL Bluetooth Ergonomic Rollerball Mouse Rechargeable Computer Laptop Thumb Mice, 3 Device Connection, Compatible with iPad, Mac, Windows, PC-Blue No Restock or group activities requiring multipleFeatures Ergonomic Design for Natural Grip: The vertical design of a 62 degree tilt and natural handshake can perfectly fit the palm of your hand, keeping your arms and wrists in a relaxed state, so that you won't feel tired after a day of work Bluetooth & 2. 4G Wireless ConnectionPLUG and PLAY. This trackball mouse has triple connection modes(2. 4G+BT 5. 1+BT 3. 0). You can control three devices at the same time, switch freely between Android, tablet