1. VT-QD10002, with inline control function,no tube
2. Coiled PVC or PU cable
3. QD plug is easy to disconnect or connect
4. Inline call function: mute and volume adjustment
5. Length 3.2 meter
6. Compatible with most IP phones (Avaya,Polycom,Mitel,Astra,Fanvil,Digium,Ecense,Nec ,Sangoma etc.) and analogue phones