Boostnatics Rechargeable Electric Electronic Turbo Keychain with Sounds + LED! - Black New Version 5 (V5) Boostnatics Electric Turbo Keychain Version 5. Black finish. No air blowing required. Push the ON/OFF button to start Boosting! When ON button is held, will emit a turbo spool up sound. When button is released (OFF), will emit 1 of 2 blow off valve sounds. Powerful night time LED light Made from high quality Zinc Alloy. Rechargeable via USB (Cord Included).