A photorealistic render of a woman wearing a yellow, banana-shaped futuristic headband with a glowing amber crystalline interior.

A realistic product render of a futuristic wearable device called the “Brain Banana”. The device is a single continuous crescent-shaped band (banana-shaped), smooth and seamless with no separate parts. It sits over the top of a human head like a woman’s headband, with a slight gap between the band and the scalp. The two ends of the crescent curve inward and downward, and the tips extend directly into the ear canals. These tips are part of the same continuous structure, not separate earbuds, not detachable, not wired. There are no earbud shapes, no headphones, no attachments. The material is a glossy yellow outer shell with an inner channel of glowing sulphur-like crystalline texture emitting a warm amber light. The glow is contained within the band. The design should clearly show the continuous arc from one ear canal, over the head, to the other ear canal. Emphasize that the device is one solid piece. Photorealistic, high-detail industrial design render, soft studio lighting, shallow depth of field, neutral background. Mehr sehen