Plantronics Discovery 600 Series Bluetooth Headset Date Code Wireless System Discovery 600 Series Bluetooth Headset (610, 640, 640E, 645, 655 and 665) 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 … Continued
