Sennheiser Command & Conquer Register Your Sennheiser DECT Headset Sales Below To enter Sennheiser Command & Conquer register any eligible Sennheiser sale through the form below. Register Your Sales Salesperson Full Name* First Last Must be representative who closed sale. Your Email* Commander Dealerership* End Customer Name* Invoice Number* Ensure this number is correct otherwise registration will not be recognised.Headset Model #*DW10 Office Phone Only 504433-CCPROMO Δ Need More Info? Read the fine-print here.