Permanent Pi4-B 4mm Indoor black-faced SMD LED Panel. It is Ideal for extremely close viewing distances. 16-bit processing, with a high contrast ratio of 3,300:1 and Lighthouses M4 colour uniformity technology guarantee unrivalled color representation.Combined with 2,000 nits brightness and wide viewing angles the Pi4-B delivers consistently superior image quality even under bright ambient light. It runs at a low temperature, setting a new benchmark for low power consumption, and has a fan-less design which ensures that it is absolutely silent in operation. In addition, the modular Pi4-B employs a new ultra-slim and lightweight mechanical design for easy installation, configuration and maintenance.