PLANTRONICS BLACKWIRE 3320, UC, STEREO USB-A CORDED HEADSET PROMO EXP 30JUN20 Plantronics Sale! from 8509 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Blackwire 3320, BW3320 USB-A Qty available: 5 SKU: 213934-01 Tweet