Welcome to our store! USB 2.0 Interface: This USB flash drive uses a USB 2.0 interface and requires no drivers, supporting plug and play functionality. Multi-Purpose: This USB drive features a whistle design, perfect for outdoor activities like hiking, fishing, camping, boating, and hunting. Also suitable for lifeguards and dog training. Stable Transmission: This USB drive provides secure, stable, and fast data transfer, compatible with Win, OS X, and other devices. Mini Size: This mini and portable USB drive features a double-tube whistle that's loud and easy to blow. Produces sound up to 120 decibels, loud enough to be heard from a distance. Aluminum Alloy: Made of strong and durable aluminum alloy. Equipped with a keychain and lanyard for easy attachment to a backpack, belt, or around the neck. Item Type: USB Flash Drive Material: Aluminum Alloy Interface: USB 2.0 Compatibility: For Win, for OS X Product Size: Approx. 68 x 15 x 7.5mm / 2.68 x 0.59 x 0.30in (Manual Measurement, Slight Error May Exist) Function: Ultra-lightweight storage device replacing floppy disks and CDs, compatible with Win or OS X Package Includes: 1 x USB Flash Drive If you encounter any product issues after receiving the item, such as damage or incorrect item quantity, please contact us immediately. We will do our best to provide you with satisfactory customer service.