Plantronics BackBeat 216 Stereo Headphones Date Code Plantronics BackBeat 216 Stereo Headphones Date Code The date code of your product designates its date of manufacture, and it can be used to establish your warranty period. The date code is generally listed with your product’s model and part number, although this is not always the case. The BackBeat 216 headphone’s date code location is shown in the red square in the diagram below. The date code is also shown on the bar code label on the box. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website