Philips CD1451B Cordless phone answer machine vs Philips CD1451B Cordless phone answer machine

Comparison of CD1451B/21, CD1451B/51

40 specifications	A Philips CD1451B Cordless phone answer machine Model CD1451B/21 View product	B Philips CD1451B Cordless phone answer machine Model CD1451B/51 View product
Performanceidentical
Answering machine	Yes	Yes
Recording time	15 min	15 min
Intercom	No	No
Maximum outdoor range	300 m	300 m
Ringer type	Polyphonic	Polyphonic
Designidentical
Mounting type	Desk	Desk
Product colour	Black	Black
Integrated antenna	Yes	Yes
Call managementidentical
Caller ID	Yes	Yes
Conference call	Yes	Yes
Call blocking	Yes	Yes
Call log entries	10	10
Call waiting	Yes	Yes
Explicit call transfer	Yes	Yes
Phone features1 differ
Phonebook capacity	20 entries	20 entries
Dialing	Tone/Pulse	Tone/Pulse
Microphone mute	Yes	Yes
Multi base capability	1	1
Multi handset capabilityDiffers	3	4
Paging function	Yes	Yes
Management featuresidentical
Volume control	Digital	Digital
Indicationidentical
Battery charge indicator	Yes	Yes
Displayidentical
Built-in display	Yes	Yes
Display	TN	TN
Backlight display	No	No
Display number of colours	Monochrome	Monochrome
Ports & interfacesidentical
Plug and Play	Yes	Yes
Wireless connection	Yes	Yes
Poweridentical
AC input voltage	220 - 240 V	220 - 240 V
AC input frequency	50 Hz	50 Hz
Battery type	AAA	AAA
Number of batteries supported	2	2
Talk time	12 h	12 h
Standby time	120 h	120 h
Weight & dimensionsidentical
Base dimensions (WxDxH)	116 x 110 x 81 mm	116 x 110 x 81 mm
Handset dimensions (WxDxH)	48 x 24 x 160 mm	48 x 24 x 160 mm
Batteryidentical
Battery technology	Nickel-Metal Hydride (NiMH)	Nickel-Metal Hydride (NiMH)
Battery capacityKnown for one	550 mAh	—Unknown — not stated by the source
Other featuresidentical
Signal strength indication	Yes	Yes
Packaging contentidentical
Number of handsets includedKnown for one	—Unknown — not stated by the source	1

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.