Answer:
The DPA-770M integrates a digital MP3 player supporting USB, SD/MMC card playback, and Bluetooth streaming with wireless remote control. It also features automatic, instantaneous cutover to an external 12V DC battery (they are not included) if AC mains power fails.
The Ahuja DPA-770M is distinguished by integrated digital playback capabilities combined with fail-safe power redundancy for critical public address environments:
- Integrated Digital Source Module: Includes an onboard digital MP3 player equipped with a USB port, SD/MMC card reader, and Bluetooth wireless connectivity, operated via front-panel controls or an included remote control.
- Fail-Safe Dual Power Operation: Configured for instant, uninterrupted switchover from 220–240V AC mains to an external 12–14V DC battery (they are not included), ensuring continuous public announcements during facility power interruptions.
- Active Equalisation: Independent active cut-and-boost controls for Bass and Treble allow precise acoustic tuning for speech intelligibility and background music playback.
