Features:     2.4GHz wireless connection, up to 10m operation distance. Power saving: if there is no 2.4GHz signal, it will automatically power off.       User-friendly key position design, which is easy to grasp. Designed with a wheel for page turning during PPT presentation.       Adjustable 500/1000 DPI optical sensor for smooth movement control. The initial setting is 1000CPI, you can use the CPI speed switch key to get your favorite cursor speed.       Pen shaped, especially suitable for handwriting input and can be used on narrow desktop. Real Plug and Play, no extra driver needed. The small mouse base will not take up too much space.       Low voltage alarm function, reminds you to replace battery in time. When all the battery power is low, the low voltage alarm light will light up to remind you to replace the battery as soon as possible. Please use alkaline AAA batteries.   Specification: Color: Red, Blue, Gray (Optional) Length: 13.8cm / 5.4inch Wireless Carrier Frequency: 2402 MHz - 2480 MHz Wireless Working Channel: 16, automatic frequency hopping Rated Operating Voltage: 5V Rated Operating Current: 15 mA Tracing System: Optics Maximum Acceleration: 14 inches / second Resolution: 500CP1 / 1000CP1 adjustable USB Interface: 2.0 version Operating Distance: 10 meters Package Weight: 54g Quantity: 1pc Package included: 1 x Wireless Optical Pen Air Mouse 1 x USB 2.4GHz Receiver 1 x Mount 2 x Adapter Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.                 .wang-edit-text{                     font-family:'Arial' !important;                 }                 .wang-edit-text table {                     border-top: 1px solid #000;                     border-left: 1px solid #000;                 }                 .wang-edit-text table td,                 .wang-edit-text table th {                     border-bottom: 1px solid #000;                     border-right: 1px solid #000;                     padding: 3px 5px;                 }                 .wang-edit-text table th {                     text-align: center;             }