Check the listing for details. Boostnatics Rechargeable Electric Turbo Keychain Keyring w/ Sounds & LED - Neo. Condition: New. Listed at 21.99 USD. This is the ultimate keychain for the turbo enthusiast! The Boostnatics rechargeable battery powered V5 Turbo Keychain spins, emits a spool up sound while holding the ON button, and will emit 2 different blow off valve (BOV) sounds when you release the button (OFF)! Also includes a handy built in LED light.Boostnatics™ Electric Turbo Keychain - Originators of the electric turbo keychainNeochrome color finish with protective coatingRedesigned internal hardware for increased durability and longevityNew 2 button design to separate sound and LED light functionsWhen ON button is held, turbine will spin and emit a turbo spool up soundWhen button is released (OFF), will emit 1 of 2 different blow off valve soundsPowerful LED night lightMade from high quality zinc alloyRechargeable via USB to Micro-USB cable (Included)Patented (US & International)