HP M231 Wireless Bluetooth Mouse Mute Dual Mode

2 connection modes: Bluetooth 1+Bluetooth 2+2.4G wireless, plug and play, stable connection Long lasting range: 1 No. 5 battery (AA), can be used for 2-3 months Metal roller: sensitive and anti slip Small and portable: Smooth in shape, delicate and comfortable in touch, small in size, easy to carry for business trips/meetings Ergonomic appearance design: the curvature fits the palm of the hand and is not prone to fatigue and comfortable to use for a long time