Product Description Brand Name: Rapoo Origin: CN(Origin) Type: Bluetooth Wireless Certification: CE Number of Rollers: 1 Gross Weight: 117g DPI: 3200 Package: Yes Number of Buttons: 8 Operation Mode: LASER Style: Trackballs Style: 3D Style: Finger Power Type: Rechargeable Time to market: 2018 Model Number: MT750L/MT750S Hand Orientation: Right Interface Type: Bluetooth Connect Type: 2.4G and Bluetooth Support Device: For 4 devices connection Color: Black Recharge: full charge up to 30 days(use 3 hour per day)