The XD-V35L sets a new standard in lavalier wireless systems for performers and presenters, delivering unparalleled audio clarity with the superior audio quality, performance and reliability of a proven 4th generation digital wireless platform, the most mature in the industry. Ensuring peace of mind and the most reliable performance, XD-V35L operates in the 2.4GHz band, which is free from interference due to TV broadcast, public safety announcements, cell phone towers and other transmitting devices. Encoded DCL (Digital Channel Lock) technology prevents reception of any audio interference from other 2.4 GHz devices and ensures signal integrity. Whatever the application, XD-V35L is all about simplicity. You don't need to be a live sound engineer to use it, just connect the lavalier mic to the robust bodypack, select one of the six always-available channels on the transmitter and receiver and you're up and running. That's it, no tweaking, no frequency scanning - it's ready to go in seconds. Easy-to-read displays on the bodypack and receiver provide accurate battery life data, so you can be confident you won't get caught with dead batteries in the heat of performance. The two included AA alkaline batteries will provide 8 hours of constant use.