S-ERF8-020-05.0-L-DV-L-K-TR S-ERF8-020-05.0-L-DV-L-TR S-ERF8-025-05.0-L-DV-L-TR S-ERF8-030-07.0-S-DV-K-TR SERGNAUOA SERGYAU0A SERGYAUEE SERGYAUOA SERIAL 7-SEG 8DIGIT BOARD SERIAL BLUETOOTH V3.0