GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM
Low Battery Alarm
When the battery is discharged to low battery state, the low battery message is displayed in the display LCD of the wireless terminal (except GDC-340H) and warning tone is heard (both GDC-33xH and GDC-340H).
Low Power Consumption
The GDC-335H supports 15 hours for continuous use and 50 hours for standby mode on fully charged battery and The GDC-340H supports 9 hours for continuous use and 50 hours for standby mode on fully charged battery.
Removable Battery Pack
The GDC-335H has one type of battery pack (330-SBP, 600mAh). It is standard battery pack. The 330-SBP
supports 15 hours for continuous use and 50 hours for standby mode.
The GDC-340H has standard rechargeable battery (1.2V rechargeable NiMH AAA size 2 cell). The battery of GDC-340H supports 9 hours in talking mode and 50 hours in standby mode.
Figure 3.6.6 Battery Pack (330-SBP, AAA size battery)
Antenna
The antenna of the GDC-335H is an wire and non-retractable antenna. Do not extract it. If you try to pull it out, it may be destroyed. The antenna of the GDC-340H is embedded.
Holes of Top and Bottom Side
There are two holes in the top and bottom side of a GDC-335H. The GDC-340H has two holes in only bottom side. The holes are special purpose and are covered with covers. Do not take off these covers. Figure 3.6.7 shows the location of the holes.
LED
antenna 
Figure 3.6.7 Holes in the Top and Bottom Side
Charger (330-SSC, 340-SSC)
The GDC-335H comes with a charger that accommodates GDC-335H and one type of battery pack. And the GDC-340H comes with a charger that accommodates GDC-340H and standard rechargeable battery. The 330-SSC & 340-SSC is supplied with the adapter (330-HAP). 330-HAP adapter is used for the charger, 330- SSC & 340-SSC. There are two types of adapter.
