Specification: Certification: NONE Origin: Mainland China Interface Type: USB Hand Orientation: Right Power Type: Rechargeable Name: Dual mode silent display vertical mouse Color classification: dark gray Number of keys: 8 Working mode: photoelectric Optical resolution: 1000-1600-2400-3200dpi Battery capacity: 730mA Charging line length: 1.5M Frequency: 2402.85MHZ-2480.82MHZ Wireless distance: ≥ 10m Wireless technology: Bluetooth-Compatible Wireless distance: 10m Working voltage/current: 3.7V-20mA Key life: 5 million times Service life of roller: 1.2 million revolutions Support ergonomics: Yes 2.4GHz return rate: 125Hz Bluetooth-compatible return rate: 115Hz Product size: 110 * 75 * 72mm/4.3*2.9*2.8in Product weight: 105g Instruction: Shortcut key function: The side buttons integrate common functions, facilitating browsing of web pages and documents, and meeting individual needs. Outstanding silent performance: Eliminate unnecessary key tones. Ergonomic appearance design: Optimize the feel and bring comfortable operation experience. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Vertical Mouse 1 x Type-C Charging Cable 1 x 8 Language Instructions 1. Dual mode operation: You can plug in the receiver to use 2.4G wireless mode or use Bluetooth-Compatible connection to operate two devices at the same time. 2. LCD display function: Real time display of working mode, power, DPI value information. 3. Built in rechargeable battery: Built in 730mAh lithium-ion battery, cyclic charging with TYPE-C interface, no more battery worries 4. DPI adjustment: When the DPI key is pressed, the cursor movement speed will be displayed synchronously on the screen.