Used for about 3 years. This is a used item. Batteries are not included (uses AA batteries). The sticker on the back is peeling and has some dirt. The pointer sometimes responds poorly. This is a gray BUFFALO mouse equipped with a wireless class laser sensor. Please understand that this is a used item before considering purchasing. Shipping will be via cushioning material and will be delivered to your mailbox. - Brand: BUFFALO - Model: BSMWW05S - Connectivity: Wireless - Sensor: Class Laser - Color: Gray - Included items: USB receiver Thank you for viewing.