Using your Clear - Com CZ11408 BP300 beltpack is easy. First, turn it on using the power button. You can adjust the volume up or down as needed. To talk, you can choose between the continuous (latched) or push - to - talk (PTT) mode. When the battery is low, you'll hear a voice prompt. Charge the beltpack using the rechargeable lithium - ion batteries, which can give you up to 20 hours of operation. Keep the beltpack in a clean and dry place to prevent dirt and moisture from getting in through the sealed buttons. If you need to clean it, use a soft, dry cloth. Avoid dropping or hitting the beltpack to protect the internal antennas. And don't forget to store it in the Santoprene carrying pouch when not in use.