BSMBB505LRD L size Color: Red Connectivity: Bluetooth Features: LED light, ergonomic design, soundless, wireless Movement detection technology: Optical Number of buttons: 5 [Compatible Devices] Computers, tablets, smartphones, and game consoles that support Bluetooth. ■ "Comfort" in shape ■ "Stability" in shape (patent pending) ■ "Comfort" in shape (patent pending) ■ Silent design that doesn't bother you even in quiet places ■ L size model recommended for people with large hands ■ Tilt wheel equipped for horizontal scrolling ■ Cursor speed switch for comfortable operation ■ High-sensitivity "BlueLED" sensor, surpassing red optical and laser sensors This is a used item, so please check the product images before purchasing. There are no operational issues. We cannot accept returns for operational defects after the product arrives.