XLR 4 Pole Male plug. XLR 4 Pole Female plug. Dual XLR 3 Pole Male plug. Dual XLR 3 Pole Female plug. function: you can use 4.4mm adapter to connect for SONY WM1A, NW-WM1Z, PHA-2A Audio player and sony headphones to listen music.any audio player connectors for optional.
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