This document summarizes the key features of the 12*RTMPS Mixer 4K UHD PiP B Pro-4G 4G Bonding Encoder. It has 12 simultaneous RTMP/S outputs, supports 4x video mixing and switching, and has a 5-inch touchscreen. The B Pro-4G is a 4th generation hardware encoder for live streaming over bonded 4G networks to provide smooth bitrates and reliable transmission in remote environments. It allows for remote video production anywhere by mixing and distributing up to 12 RTMP/S streams from a single device. The encoder also has features like video switching, scoreboarding, HDMI/SDI inputs, HEVC/H.264 encoding, and