WE789AA, 27MHz, 1750DPI, AA, USB 2.0, 82.5g

Work in style, wherever, without compromising functionality with this wireless mouse. The non-slip rubber sides add control, while the sensor ensures maximum precision.
• Cut the cable and the clutter, as you enjoy the freedom of 27MHz wireless technology.
• Work with confidence, wherever your day takes you! The optical sensor with adjustable sensitivity (1250 CPI default, 1750 CPI max) works on many surfaces, while the single AA battery lasts up to six months.
• You'll never lose a receiver again! The mini-receiver is so slim you can store it inside the mouse.
• Designed for comfort and ease of use, the rubber sides and symmetric design provide a comfortable and secure grip for left or right hand use.
• The rubber trim on the scroll wheel provides superb control as you scroll up and down, while the green LED scroll wheel illumination indicator lets you adjust sensitivity and warns of low battery.

HP Wireless Optical (Blue) Mouse, Optical, RF Wireless, 1750 DPI, Blue

HP Wireless Optical (Blue) Mouse. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1750 DPI, Buttons quantity: 4. Product colour: Blue