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This is a PHS terminal (jacket phone) equipped with GPS. It uses a W-SIM (Willcom-SIM.)
It can perform location searches making use of the characteristics of both GPS and PHS.
Out in the open, GPS can precisely identify your location. Inside or underground, PHS can roughly determine where you are.
It has all the basic necessary functions, so you can let your children use it without any worry.

GPS Jacket Phone

This is a PHS terminal equipped with a W-SIM.
GPS is built-in, so the location can be determined precisely using not only PHS but also GPS.
It also features an emergency notification function linked with weak wireless and an automatic voice notification function.
It has a built-in lithium-ion battery which, when fully charged, allows for approximately 200 hours of continued standby time or 6 hours of continued use.
It's compact and lightweight (Width 105 mm x Height 45 mm x Thickness 20 mm, approx. 93 g).

It uses the “Mikke! GPS Service” from Virgo Wave Inc.
http://www.mikkegps.jp/index2.html

This is a tool that uses cellular phone networks and GPS to send messages from the terminal and identify the location.
The terminal uses cellular phone public networks to send messages.
The messaged location of the terminal can be somewhat determined from the location of the base station the terminal has acquired, or the location measured by GPS.

GPS Cellular Phone

This is a PDC terminal that restricts the destination it can communicate with.
It has built-in GPS and the terminal's location can be externally determined.
It has a built-in emergency notification, hands-free function, and voicemail service, and can be set to a no radio wave mode.
It has a built-in lithium-ion battery which, when fully charged, allows for approximately 200 hours of continued standby time or 100 minutes of continued use.
It's compact and lightweight (Width 46 mm x Height 95 mm x Thickness 26 mm, approx. 89 g).

This is a system that uses PHS and low-power wireless to get messages from the handset.
The moving handset communicates through low-power wireless with the base whenever it can connect. The base delivers the information from the moving handset via the PHS public network.
If it cannot communicate with the base, the moving handset uses the PHS public network itself to send messages.
A non-moving handset communicates with the registered base through low-power wireless, and messages from a non-moving terminal are always delivered via the PHS public network from the registered base.
The position of the messaging handset can be somewhat determined from the location of the base, which received a message from the handset, or the position of the PHS public base that the moving handset is connected to.

PHS Combined System

Not only a PHS terminal, it also has built-in low-power wireless and can monitor data from the RH-182 and RH-183.
The low-power wireless section also uses a PLL synthesizer, and can change its frequency based on its environment.
It has built-in features such as a phonebook for 200 entries, voicemail, recording, hands-free use, and e-mail.
It has a built-in nickel hydride battery, and can even be used in a blackout.

Not only a PHS terminal which limits destinations it can call, it also has built-in low-power wireless and can communicate with the RH-181.
The low-power wireless section also uses a PLL synthesizer, and can change its frequency based on its environment.
It has built-in emergency notification and hands-free functions.
It has a built-in lithium-ion battery which, when fully charged, allows for approximately 500 hours of continued standby time or 5 hours of continued use.
It's compact and light-weight (Width 45 mm x Height 83 mm x Thickness 23 mm, approx. 56 g).

Low-power Wireless Terminal RH-183

It uses a PLL synthesizer and can change its frequency based on its environment.
It detects the contact signal from the external device and can communicate with the RH-181.
It can connect with a non-voltage contact output sensor.
You can select from a-contact points and b-contact points.
It uses general AA batteries, which last about 2 years under normal use.