This is a holder for a standaard flat lithophane from https://lithophanemaker.com/

The holder contains a led from Teemu : https://www.temu.com/nl/1pc-3pcs-creatieve-usb-lamp-nieuwe-energiebesparende-draagbare-nachtlampje-mini-usb-draagbare-voedingspoort-led-draagbare-lamp-burst-atmosfeer-cadeau-decoratie-slaapkamer-oogbescherming-bedlampje-slaaplicht-g-601099517148195.html?top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2FFancyalgo%2FVirtualModelMatting%2Fd3c0cf77758e49eab92e8aa8acf29f1c.jpg&spec_gallery_id=4004720120&refer_page_sn=10009&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=NDg&search_key=led&refer_page_el_sn=200049&_x_sessn_id=80zmylag4j&refer_page_name=search_result&refer_page_id=10009_1700339255514_evv2kf1i74