Specifications

Model : B151
Menu structure in the handset : List Menu
Signal strength indicator : 3-bar indicator
Battery level indicator : 3-bar battery icon
Intercom - multiple handsets : Yes
Date/Time display : Yes
Programmable hot keys : Key 1 and 2
Display size : 4.1 cm/1.6"
Display type : 12 digits (Alphanumeric) + hard icons
Backlight : Yes
Backlight colour : Blue
Battery capacity : 300 mAh
Battery type : AAA NiMH Rechargeable
Mains power : AC 100-240 V ~50/60 Hz
Power Consumption : < 0.7 W
Size : 13.5cm(H) x 18.4cm(W) x 5.9cm(D)
Gross weight :0.3467 kg
Net weight :0.2626 kg
Tare weight : 0.0841 kg
Transmission encryption : Yes

Specifications

Model : D230
Menu structure in the handset : List Menu
Speakerphone — talk hands-free : Yes
Call barring : Restrict the phone from making specific outgoing calls
Battery level indicator : 3-bar battery icon
Date/Time display : Yes
Keypad lock : Yes
Display size : 4.6 cm/1.8"
Display type : 1-line dot matrix + 1-line numeric + icons
Backlight : Yes
Backlight colour : White 
Battery capacity : 500 mAh
Battery type : AAA NiMH Rechargeable
Mains power : AC 100-240 V ~50/60 Hz
Power Consumption : < 0.7 W
Size : 13.5cm(H) x 18.4cm(W) x 5.9cm(D)
Gross weight : 0.3882 kg
Net weight : 0.3125 kg
Tare weight : 0.0757 kg
Transmission encryption : Yes

Specifications

Model : D330
Menu structure in the handset : List Menu
Speakerphone — talk hands-free : Yes
Signal strength indicator : 3-bar indicator
Battery level indicator : 3-bar battery icon
Date/Time display : Yes
Keypad lock : Yes
Display size : 4.1 cm/1.6"
Display type : 1-line dot matrix + 1-line numeric + hard icons
Backlight : Yes
Backlight colour : White 
Battery capacity : 550 mAh
Battery type : 2 x AAA NiMH Rechargeable
Mains power : AC 100-240 V ~50/60 Hz
Power Consumption : < 0.7 W
Size : 12cm(H) x 22.5cm(W) x 10cm(D)
Gross weight : 0.594 kg
Net weight : 0.4166 kg
Tare weight : 0.1774 kg
Transmission encryption : Yes

Specifications

Model : M550
Menu structure in the handset : List Menu
Speakerphone — talk hands-free : Yes
Signal strength indicator : 3-bar indicator
Battery level indicator : 3-bar battery icon
Date/Time display : Yes
Keypad lock : Yes
Display size : 3.4 cm/1.6"
Display type : 2-line graphical + hard icons
Backlight : Yes
Backlight colour : White 
Battery capacity : 550 mAh
Battery type : 2 x AAA, NiMH
Mains power : AC 100-240 V ~50/60 Hz
Power Consumption : < 0.6 W
Size : 9.5cm(H) x 31.8cm(W) x 8.1cm(D)
Gross weight : 0.626 kg
Net weight : 0.468 kg
Tare weight : 0.158 kg
Transmission encryption : Yes