This is the spare or replacment PTT remote for the CA22CD-DC Wireless Headset System. comes with battery. part# 218400-03. Spare PTT only does not include the base.
For more information and specs see Poly CA22CD-DC datasheet and Poly CA22CD-DC user Manual
*Important Note on Returns: Due to the manufactures policy, this is a special order item. All Sales are FINAL. It's not returnable, not refundable under any circumstance. If it's defective, Plantronics/Poly will replace it for you under warranty