4K signage box wholesaler — Wanlin AndroidSBC, 12-year Chinese digital signage box and Android media player manufacturer, WL-SB300 (RK3588 8K AI Digital Signage Box Motherboard) certified CE/FCC/RoHS. RK3588 Octa-Core Cortex-A76/A55 2.4GHz + Mali-G610 MP4 + 6 TOPS NPU + 8K@60fps + 8GB LPDDR. MOQ from 50 units, OEM/ODM from 500 units, 15-20 day delivery, 60+···