The image shows a close-up of a bicycle's rear derailleur. The focus is on the brake caliper, which is attached to the rear wheel of the bike. The caliper is black and silver in color and has the brand name "Acerbis" written on it in white letters. The brake lever is also black and appears to be made of metal. The wheel is black with silver spokes and has a chainring attached to it. The background is blurred, but it seems to be a grassy area.