Whistle USB flash drive sos outdoor waterproof whistle USB flash drive USB3.0 flash memory stick high speed flash drive flash drive thumb drive zinc alloy with keychain 32GB silver

;USB3.0 Interface: USB3.0 interface, high speed data transmission, data reading and writing speed is higher than USB2.0, no driver, plug and play, equipped with Micro USB interface and Type‑C interface adapter.;Universal Compatibility: USB flash drives for Windows, for OS X and other devices, you can easily transfer data or content through fast plug and play functions.;120 Decibels of Sound: The double pipe whistle is very loudly and easy to blow, delivering up to 120 decibels of sound, enough to be heard at long distances.;Multipurpose: U disk is suitable for outdoor activities such as hiking, fishing, camping, boating and also for lifeguards, pet dog training, etc.;Waterproof: U disk is designed with no beads inside, which is waterproof and can be used for calling teammates for help, signal transmission, and sports training outdoors.