Features 11. Touch plane, support horizontal and vertical scroll, left and right keys. 22. Comfortable to fit the natural curve of the hand. 33. Bluetooth 4.0 connection, lower power consumption, more stable performance and smoother use. 44. Bluetooth folding touch. 55. Ultrathin. Specification Model: ZTW-21 folding touch mouse Connection method: Bluetooth 4.0 Wireless frequency: 2.4GHz frequency range Wireless range: about 10 meters Size: 131.2 * 55 * 14.5mm/5.16 * 2.16 * 0.57inch (Approx.) Weight: 82.5g with battery Battery: 2 AAA alkaline batteries Connection with the computer: Bluetooth Applicable models: Notebook computers Photoelectric resolution: 1600 (dpi) Number of keys: 2 (keys) Interface: Bluetooth Adjustable resolution: four gears Wheel direction: touch wheel Package List 1 * Folding Bluetooth Mouse