The Jabra 6399-829-209 Evolve 40 UC Stereo is a corded headset with a busy light feature. It integrates with VoIP softphones, mobile phones, and tablets, and is compatible with Jabra Intelligent Call Transfer. The headset includes a USB adapter with a built-in 3.5mm jack for PC, smartphone, and tablet connections, and features soft leatherette ear cushions.