Lectrosonics DBu - Digital Encrypted Belt Pack TransmitterThe DBu transmitter is a second generation design with specially developed, high efficiency digital circuitry for extended operating time on two AA batteries. The trans mitter can tune in coarse or fine steps across the UHF television band from 470. 100 to 607. 950 MHz, with a selectable output power of 25 or 50 mW. The pure digital architecture enables AES 256 CTR encryption for high level security applications. Studio quality audio performance is