ship from Japan Connected by Bluetooth, realized a connection with almost no delay within a wireless communication range of 10 m. No software installation required. Note: 1. The wireless connection range varies depending on the usage environment. 2. Forward and back buttons are not available on Mac OS devices. Featuring an ergonomic shape for all hand sizes, the buttons are perfectly suited to the demands of offices and games. Avoid hand fatigue during long-term use. It also has sweat resistance, non-slip and anti-fingerprint performance. Since the mouse hits the palm and the entire fingertip, it is a mouse that can be operated without discomfort. Quiet Design: The mute design with advanced sensors allows you to click without clicking and disturbing others with the push of a button. Don’t worry about disturbing others and keep your focus on the job.