The Micro Clock MKIII XB is the most accurate word clock we’ve developed to date. With only 0.6pS RMS of jitter at the BNC outputs, it has less than one third of the jitter of the standard Micro Clock MKIII! It boasts incredibly accurate crystal oscillators and superior quality galvanic isolation, both of which contribute to the extraordinarily low jitter measurement. Product Features/Specifications: Ultra-low jitter, harmonically-enhanced word clock signal generation Dimmable frequency display 8 selectable sample rates (44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, and 384kHz) 6 BNC outputs with dedicated output drivers for maximum isolation RCA S/PDIF output Optical S/PDIF output AES output Full & 1/2 rack removable rack ears Locking frequency selector knob Technical Specifications: Link: https://www.blacklionaudio.com/store/word-clocking/micro-clock-mkiii-xb/#specs Jitter 0.6pS RMS (BNC outputs) Outputs 6 BNC, 1 XLR AES, 1 RCA S/PDIF, 1 Optical S/PDIF (recommended max. cable length = 1,000ft of high quality, 75Ω coaxial cable) BNC: 75Ω, 5V unterminated RCA S/PDIF: 75 Ω, unbalanced AES XLR: 110 Ω, balanced Clock Frequencies BNC (kHz) – 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 RCA S/PDIF & AES (kHz) – 44.1, 48, 88.2, 96, 176.4, 192 Optical S/PDIF (kHz) – 44.1, 48, 88.2, 96 Power 9VDC (6W power consumption) Power connector 2.1mm barrel connector with 5.5mm outer diameter (center pin positive) Weight 2.2lbs Dimensions 6.5”L x 6”W x 1.75”H (without rack ears installed) Shipping weight 4lbs Shipping dimensions 13” x 13” x 5”