Mice & Trackballs Specification: 1.2.4G wirele mouse, transmiion distance 10m 2.3 CPI adjustment: 800/1200/1600 3. Micro wirele receiver 4. Support Windows 7/8/10/Vista/XP/2000, Android, Linux, Mac OS 5. Use 1 AAA battery 6. Detailed parameters: (1) Product size: 140 * 20 * 15mm (2) Product weight: 29g (3) Number of keys: 4 (4) Radio carrier frequency: 2402 MHz - 2480 MHz (5) Wirele working channels: 16, automatic frequency hopping (6) Rated working voltage: 3V (7) Rated working current: 15 mA (8) Tracking system: optical (9) Speed: 14 inches/second Product features: 1. Effective distance of 2.4Ghz wirele transmiion is 8-10 meters. 2. AVAGO 5090 optoelectronic chip is linear and stable, with strong surface croing capability. 3. The current is 14mA, one No. 7 battery can be used for 1-3 months, and the automatic power off function without signal saves more power. 4. Handwriting input, which can be used on a narrow desktop. 5. Handwritten design, comfortable to use when sitting at different angles, without fatigue. 6. Humanized key position design, easy to grasp. 7. The mouse small base does not occupy space. Instructions: 1. Hold the front part of the pen mouse with your left hand, and pull the battery cover outward with your right hand to remove the battery cover. 2. Install an AAA alkaline battery and turn on the switch of the pen mouse. 3. Take the micro USB receiver out of the battery compartment and insert it into the USB port of the computer. The pen mouse and the receiver have been paired when they leave the factory, so you can automatically connect the mouse by inserting the receiver into the USB socket of the computer. 4. The pen mouse can move the cursor by sliding on the mouse pad, desktop, etc. like a pen. It can be used in busine meetings, PPT deduction in work, speeches, teaching and many other occasions. Pick up the pen mouse with your hand, and use the scroll wheel on it to demonstrate PPT, pictures, etc. Function: 1. Low voltage alarm function When all batteries are low, the low voltage alarm light of the pen mouse will light up to remind you to replace the batteries as soon as poible. Alkaline AAA batteries must be used when replacing batteries. 2. Cursor speed switching function The mouse provides three speeds of 800/1200/1600DPI for you to choose. The initial setting is 1200CPI. You can use the CPI speed switch key to obtain your favorite cursor speed.