ELE Specialized TURBO CONNECT UNIT DISPLAY (A1.2) WITH GITEKI MARK Turbo Connect Display (TCU) wired top-tube mounted display used on various Turbo model bikes. TCU enables rider to turn their bike On/Off via the power button at the bottom of the display. Three LED&';s at the top of the display show the rider their current assist mode (Eco/Trail/Turbo/Off). Rider can switch assist modes by pressing the S button at the top of the display. Ten LED bars show the rider their battery charge level. Bluetooth functionality enables App connectivity with Mission Control or Specialized App via pairing code (located on back of TCU). Ability to display system error codes to the rider to assist in trouble shooting. Uses CR 1620 coin-cell battery.