Max. water pressure
Temperature in use
Possible conversation range Within visual range underwater
When charging is completed LED will be OFF
How to charge
Consecutive use time
89.0mm x 41.0mm x 44.8mm
0 to 40C
Bone conduction microphone
Magnetic-type bone conduction speaker
Ultrasound:32KHz, voice range: 4KHz SSB-AM system
* There is no law regulations for underwater ultrasound using in Japan.
Ceramic piezoelectric element
The max transmitting/receiving power is available when facing front side of an antenna to a receiving/transmitting person
Transmitting/receiving power becomes min. when transmitting and receiving persons are facing opposite directions
Tap a unit one time to start transmitting
Either no input sound to microphone for more than 3 sec. or tap a unit one time to end transmitting
LED will be ON (red)
Tap one time in receiving, transmitting will start
Tap one time in transmitting, transmitting will end
Detecting water turns power ON.
Detecting no water for more than 1 min. turns power OFF automatically.
Approx. 2 hours at 500mA.
Li-ion battery 560mAh
Approx. 3 hours assuming 10% of the time is used for transmitting.
Li-ion battery should be exchanged by the manufacturer