Merchant sitemap last-modified value: 2026-11-08T23:28:18+08:00. This is separate from the observation date.
Choose the exact option at the merchant
Photos identify the merchant product reference; they do not establish every selectable power, size, color, supply, lens or bundle. Current availability and shipping need a fresh check at the store.
Exact option prices and stock were not captured for this reference. Open the merchant page to inspect the available choices.
Individual creator perspectives, with model and commercial limits below. Load a standard YouTube player only when you choose; YouTube then receives playback requests under its own practices. The product photo is not a video still.
Product reference photo
Longer B1 20W
Longer Laser B1 20W - Back to the roots - Aufbau Test und Fazit
Build, demonstrations and a support discussion from a German maker channel.
Named model and power · Only the 20W B1 is described. The parent listing includes other powers; 30W and 40W are not reviewed here.
Commercial disclosure & source scope
YouTube marks paid promotion; the description includes a merchant referral link. Its general self-purchase statement does not resolve the funding of this particular video.
Description and primary-source metadata checked 2026-11-09. We have not reviewed the full video or independently verified its results, settings or funding. Exact hardware revision remains unconfirmed.
Product reference photo