Bosch and Hella turn signal relay flashers 211 953 215 C were used in Volkswagen vehicles and are no longer available.Pantera Electronics addresses the needs by providing a electronic replacement that fits inside the original Bosch or Hella enclosure.By removing the Bosch or Hella electronics and replacing it with the Pantera Electronics Board the flasher looks factory yet has long life modern electronics.These turn signal relays have the capability to operate incandescent or LED lamps and can be in any combination without the need of any additional modifications. All of the versions of the Bosch flasher relays have a KBL indicator terminal even if it wasn’t offered in the original Bosch flasher.Additionally there is an adjustable flash rate to control the speed of the lights flashing for sequential LED taillights.Some models include a tone indication of when the turn signal is operating for loud environments.