User's Manual
11
•  Clean the OTTO
®
 Speaker Microphone only with a dry cloth. 
•  Do not clean the speaker microphone when it is being charged. 
Always unplug the charger rst before cleaning the speaker 
microphone. 
•  Do not use abrasive cleaners to clean your speaker microphone 
because this could cause scratches and damage.
CARE AND MAINTENANCE
SPECIFICATIONS
•  Compatible with a growing number of two-way radios, 
smartphones and tablets 
•  Battery discharge time is approximately 12 hours with an 80-
10-10 duty cycle
•  Noise-canceling Speaker Mic Sensitivity @94 dB SPL: -35 dB 
Typical. 
•  Bluetooth
® 
operating range: 10 meters
•  Bluetooth 5.0 wireless communication standard
•  Meets MIL-STD-810 for high performance in harsh 
environmental conditions including 40 mph blowing rain
•  PTT switch life: 200,000 cycles
•  Operating temperature: -4°F to 140°F (-20°C to 60°C)
•  Storage temperature: -40°F to 158°F (-40°C to 70°C)
•  1-year warranty on battery; 2 years on speaker microphone
Bluetooth
®
 REVO NC2
™










