VoiceBooster Voice Amplifier 10watts Black MR1506 by TK Products, Portable, for Teachers, Coaches, Tour Guides, Presentations, Costumes, Etc. auspowers_batchthree also can program one remote

also can program one remote for multi alarms

these lock nuts greatly reduce loosening under vibrations and torque

please try to open “OTG” feature at phone setting page

a good choice for Supermarket

VoiceBooster Voice Amplifier 10watts Black MR1506 by TK Products, Portable, for Teachers, Coaches, Tour Guides, Presentations, Costumes, Etc. auspowers_batchthree also can program one remoteVoiceBooster Voice Amplifier 10watts Black MR1506 by TK Products, Portable, for Teachers, Coaches, Tour Guides, Presentations, Costumes, Etc. Product Features Small Super Powerful Voice Amplifier Speaker. Size is 3. 75in x 2. 81in x 1. 08in (90mm x 70mm x 27mm) Rechargeable lithium batteries that last 6 8 hours of continuous use before needing a charge. Battery life will last 2 3 years. Very loud, excellent clarity, low feedback. Sound covers over