The BY-MA2 Dual-Channel XLR Audio Mixer for DSLRs and Camcorders from Boya is a 2-channel XLR audio mixer designed for cameras with a 3.5mm input jack. It can be used to connect professional-quality wireless microphone receivers, XLR shotgun microphones, and lavalier microphones to improve audio performance. The BY-MA2 features a built in standard 19mm bolt rod that can be attached to any camera cage with a 19mm rod. A 15mm bolt rod adapter is included for compatibility with 15mm rod cages. In addition, three 1/4-20 female threads are available for mounting to tripods, or the included cold-shoe mount adapter. Finally, the BY-MA2 Dual-Channel XLR Audio Mixer is a passive mixer (no batteries or phantom powered required) and is equipped with a switch to select inputs XLR1, Mix, and XLR2 jacks on the front panel.