Beurer BC 21 vs Microlife BP W2 Slim

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BC 21 compared with BP W2 Slim

	BeurerBC 21	MicrolifeBP W2 Slim
Overview
Released
Released	–	–
Measuring
Type
Type	Wrist	Wrist
Clinically validated
Clinically validated	–	Yes
Irregular heartbeat detection
Irregular heartbeat detection	Yes	Yes
AFib detection or ECG
AFib detection or ECG	No	No
Method
Method	Automatic oscillometric wrist measurement during deflation. Exact UK item 65046, EAN 4211125650469; SK2 voice-language version. First-sale date unconfirmed	Automatic oscillometric wrist measurement during inflation, marketed as IMT/Comfort+; exact 2015 and August 2020 operating instructions both explicitly describe inflation measurement. First on-sale date unresolved
Accuracy
Accuracy	Exact manual display accuracy ±3 mmHg for systolic and diastolic pressure and ±5% for pulse. Systolic range 60–260 mmHg, diastolic 40–199 mmHg and pulse 40–180 beats/minute; cuff-pressure range 0–300 mmHg is separate	Static pressure accuracy ±3 mmHg and pulse ±5% of readout. August 2020 manual gives 20–280 mmHg blood pressure and 40–200 bpm; current support instead lists separate systolic 60–255 and diastolic 40–200 mmHg ranges. Cuff-pressure display 0–299 mmHg is separate
Clinical validation
Clinical validation	Exact manual gives an unspecified clinical-test maximum permissible standard deviation of 8 mmHg, without identifying a published study. Medaval reports no peer-reviewed clinical validation information for BC 21, but incorrectly labels its measurement site upper arm; exact maker manual establishes wrist measurement. Independently established headline validation omitted	Exact W2 Slim passed adult ESH-IP 2010 and ANSI/AAMI/ISO 81060-2:2013 protocols in Bing et al., published 2016; STRIDE BP lists a validated 13.5–23 cm cuff. This is exact-model evidence, distinct from later W3 Comfort equivalence. Study date does not establish first retail sale
Features
Features	Spoken instructions and results in German, English, French, Italian or Turkish for UK item 65046; three volume levels or off. Shared data sheet separately lists item 65040 with English, Spanish, Polish, Arabic and Farsi; those languages are not part of this UK version. Irregular-heartbeat warning, coloured classification scale, date/time, application-error messages and automatic switch-off. No dedicated AFib screening, ECG, movement detection, heart-level position or resting indicator	Ordinary pulse-arrhythmia indication, cuff-fit check, arm-movement warning, colour classification scale, low-battery warning and automatic switch-off after approximately one minute. No dedicated AFib screening or MAM sequence established
Cuff
Cuff fits
Cuff fits	14–19.5 cm	13.5–23 cm
Cuff
Cuff	Attached wrist cuff for 14–19.5 cm circumference. User must position the cuff at heart level; no electronic position guidance	Wrist circumference 13.5–23 cm; damp cloth and mild detergent for cleaning
Connections and memory
Users
Users	2	2
Readings stored
Readings stored	60 per user	60 per user
Bluetooth and app
Bluetooth and app	No	No
Memory
Memory	Two users with 60 dated readings each; oldest overwritten when full. Average of all stored values and morning (05:00–09:00) or evening (18:00–20:00) readings over the latest seven days. Deletion clears the selected user's entire memory	Up to 60 dated readings for each of two users selected by physical user switch. Oldest overwritten when full. Memory retained on cell replacement while clock resets. New reading can be excluded; stored history clears together for selected user. Instructions describe individual recall, not an automatic all-readings average
App
App	No Bluetooth or connection from the monitor. Current Scan & Save support captures displayed values using a smartphone camera into beurer HealthManager Pro; not automatic transfer	–
Power
Power	Two 1.5 V LR03 AAA alkaline batteries; approximately 200 measurements depending on blood pressure and inflation pressure. Battery operation only	Two 1.5 V AAA alkaline batteries, approximately 320 measurements with new cells. NiMH rechargeable cells supported but charged externally. STRIDE's additional-feature table mentions AC adapter and PC link, but exact operating instructions establish neither interface; those claims are not adopted
Design
Display details
Display details	Non-illuminated LCD with black digits, maker size 3.8 × 4.5 cm. Physical membrane memory and start/stop controls; low-battery indicator. Manual IP22	LCD with ON/OFF, memory and time controls, user switch and colour classification scale; IP20 in August 2020 manual
Size
Size	Exact manual and September 2021 data sheet give 87 × 67 × 31 mm (L × W × H) and approximately 105 g without batteries; data sheet specifies cuff included. Current product table instead gives 87 × 67 × 70 mm and 187 g excluding packaging, with weighing conditions unspecified; differences unresolved	81 × 65 × 21 mm; 115 g including batteries
In the box
In the box	Monitor with attached cuff, two AAA batteries, storage box and instructions. Current product page also lists a blood pressure record	Monitor, storage box, two AAA alkaline batteries and blood-pressure diary listed by surviving manufacturer page. Product resource is Arabic regional maker page; support and linked instructions include English