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No cable attached and compact Can use your normal diving gears together

Matt Black

[Logosease] is an underwater two-way ultrasound wave communicator device, with which you can enjoy conversation in scuba diving. Just set a pocket-sized Logosease at diving mask of each diver, you can use it easily even with the air regulator in your mouth.
Not only for the advanced divers diving all year around, but for beginners who take diving course in diving school, and tourists who experience diving in resorts, we provide the new joy of sharing discoveries and excitements underwater with [Logosease].

Wireless communication with ultrasound and 
bone conduction technology Voices to be adjusted in real time to the ones easier to hear Small sized product resistible pressure of 55M water depth

Logosease

Conveys the excited moment

Conveys the excited moment

Shares in a group

Shares in a group

Speech-based training is available

Speech-based training is available

Can communicate to your buddy away from you

Can communicate to your buddy away from you

For snorkeling too!

For snorkeling too!

Names of each section

Logosease is wireless and compact.You can transmit and receive your voice only with this palm-sized unit.

Names of each section

Mechanism of communication

Communication is done with ultrasound. Bone-conduction microphone (built-in) collects the vibration of sender's voice from his/her bone, and send it via ultrasound. After a receiver catches it, the bone-conduction speaker (built-in) will transfer to the receiver via his/her bone.

Communication mechanism

lineup

lineup

DIVE TRANSCEIVER PROFESSIONAL MODEL SURFACE STATION OPTION

transceiver

advancedmodel

Multi-functional advanced model

advancedmodel

MAT BLACK

MAT YELLOW

POWDER PINK

3channel
recorder
trainingmode
customize
whistlemode
voiceguide
alarm
airchecktimer

basicmodel

Simple basic model specialized for communication

basicmodel
basicmodel

MAT WHITE

trainingmode
customize
whistlemode
voiceguide
alarm
airchecktimer
specifications

businessmodel

rescuemodel

Communication is enhanced

rescuemodel

MAT YELLOW

recorder
trainingmode
customize
whistlemode
voiceguide
alarm
airchecktimer

receiver

For training or guide

receiver

SKY BLUE

customize
airchecktimer

land

land

Handy tool to communicate between underwater divers and on surface

land

Cable (10m) with antenna included

option

hood

Applicable not only to Logosease but also in ordinary diving.

hood

Sizes:
Size M
  Head circumference: 56 - 57cm
  Neck circumference: 33 - 35cm
Size S
  Head circumference: 54 - 55cm
  Neck circumference: 29 - 31cm
Color: black
Material: Chloroprene
** The production of size X and XL are terminated.
Once stock of size M and S are gone, they will be no longer available.

cradle

Special charger for Logosease

cradle

cradle

Special strap to prevent Logosease from dropping

cradle

* Special charger and special strap are included in Logosease.

・LGS-RG004
Special charger x 1, Special strap x 1
・LGS-RG005BA
Special charger x 1, Special strap x 2

Main specifications

  LGS-RG004 LGS-RG005BA
Features Multi-functional, scalable advanced model 2 units/set basic model specialized in communication
Outer Packaging Colors Mat black, Mat yellow、Powder Pink Mat white
Size 89.0mm×41.0mm×44.8mm 89.0mm×41.0mm×44.8mm
Weight Approx. 107g Approx. 107g
Max. water pressure At 55m depth At 42m depth
Temperature in use 0゚C ~ 40゚C 0゚C ~ 40゚C
Audio Section Microphone Bone conduction microphone Bone conduction microphone
Speaker Magnetic-type bone conduction speaker Magnetic-type bone conduction speaker
Communication Section channels

3 channels (Channel A, B, and C)
*Default is channel A

1 channel (Channel A)

Frequencies
(ultrasound wave)
Channel A: 32KHz USB
 
Channel B: 36KHz USB
 
Channel C: 40KHz LSB
(band frequency)
4KHz SSB-AM basis
*There is no law regulations for use of ultrasound underwater in Japan.
*Channel B and C may interfere each other a bit, but you cannot hear the contents well.
(ultrasound wave)
Channel A: 32KHz USB
(band frequency)
4KHz SSB-AM basis
*There is no law regulations for use of ultrasound underwater in Japan.
Antenna Ceramic piezoelectric element Ceramic piezoelectric element
Transmission Range

50-100 meters (Channel A)
*Transmission range and intelligibility of speech are up to the environment in use.

(related location to your buddy, wave condition, underwater visibility, and blocks)

50-100 meters

*Transmission range and intelligibility of speech are up to the environment in use.

(related location to your buddy, wave condition, underwater visibility, and blocks)

Direction effect The power of communication will be max. when front side of the antenna of each divers faces each other.
It will be min. when they are facing opposite ways.
The power of communication will be max. when front side of the antenna of each divers faces each other.
It will be min. when they are facing opposite ways.
Display Section When power is ON
(indicating battery remaining)
Fully charged: LED blinking in green
Left enough for 1 more dive: LED blinking in blue
Need charging: LED blinking in red
Fully charged: LED blinking in green
Left enough for 1 more dive: LED blinking in blue
Need charging: LED blinking in red
Transmitting mode Pink LED is ON Pink LED is ON
Receiving mode Channel A: LED blinking in yellow
Channel B: LED blinking in blue
Channel C: LED blinking in light blue
Channel A: LED blinking in yellow
LED while charging Red LED is ON Red LED is ON
LED after charging LED is OFF LED is OFF
Operation Section Tapping

Tapping once in receiving mode → transmitting mode starts.
Tapping once in transmitting mode → transmitting mode finishes. (receiving mode starts)

Tapping once in receiving mode → transmitting mode starts.
Tapping once in transmitting mode → transmitting mode finishes. (receiving mode starts)

Hands free VOX in receiving mode → transmitting mode starts.
No sounds for 3 sec. in transmitting mode → transmitting mode finishes. (receiving mode starts)
VOX in receiving mode → transmitting mode starts.
No sounds for 3 sec. in transmitting mode → transmitting mode finishes. (receiving mode starts)
Memory Flash memory 512MB No memory
Power switch ON Turns on by detecting water Turns on by detecting water
OFF Automatically turns off in 1 minute after removed from water. Automatically turns off in 1 minute after removed from water.
USB Battery charging Required about 2 hours at 500 mAh Required about 2 hours at 500 mAh
Battery Rating 560mAh with Li-ion battery 560mAh with Li-ion battery
Charging method by USB by USB
Duration About 3 hours (assuming 10% of the time is used for transmitting) About 3 hours (assuming 10% of the time is used for transmitting)
Maintenance The manufacturer replaces the Li-ion battery The manufacturer replaces the Li-ion battery
Other functions

Voice recording
Training mode
Customizing
Whistle mode
Dive computer alarm support
Voice guide
Air check timer


Training mode
Customizing(partially)
Whistle mode
Dive computer alarm support
Voice guide
Air check timer

Upgrading software version Available Available
Accessories Cradle, USB cable, Strap, Speech training sheet Strap x 2, Speech training sheet x 2. All others x 1each
● Logosease is a registered trademark of Yamagata Casio Co., Ltd.
● Specifications and outer packaging may change without any advanced notices.