Helix Smart 2.0 — case dimensions and design

Helix · 2021

Smart 2.0 Size, Dimensions & Wrist Fit

Case Width

41mm

Thickness

14mm

Lug-to-Lug

51mm

Weight

30g

The Smart 2.0 looks in proportion on wrists of 16 cm (6.3 in) and up round, and fills the wrist at 16.5–18.5 cm (51mm lug to lug).

Check Wrist Fit CompareCheck offer

As an Amazon Associate, WatchFitTool earns from qualifying purchases.

Does the Smart 2.0 fit your wrist?

Wrist round (mm left each side)	41mm
14 cm / 5.5 in	Overhangs (2.9mm over)
15 cm / 5.9 in	Overhangs (1.3mm over)
16 cm / 6.3 in	Bold (0.3mm)
17 cm / 6.7 in	Sweet spot (1.9mm)
18 cm / 7.1 in	Sweet spot (3.5mm)
19 cm / 7.5 in	Balanced (5.1mm)
20 cm / 7.9 in	Balanced (6.8mm)

How the fit model works · Size chart for every wrist

The Smart 2.0 in short

Rated for 9 days of use per charge.
Water rated to 1 m.
30g on the wrist.
1.55 inches LCD display.

Compare with another watch

Size, fit and battery side by side, against any smartwatch we list.

↑ ↓ to move · Enter to open the comparison · Esc to close

Smart 2.0 battery life

Published runtime

Battery life9 days

Settings to change and the 24-hour idle test are on the battery check.

2D Dimension Schematics

Top view

Side view

Helix Smart 2.0 41mm × 51mm · 14mm thick

3D preview

Helix Smart 2.0 on a wrist

Alternatives to the Smart 2.0

Smart 2.0 specifications

Battery life: 9 days
Display: 1.55 inches
Resolution: 240 x 240 px
Water rating: Waterproof

Show all specificationsHelix's published specification, for reference · checked September 2026

Design

width: 41
height: 51
volume: 29.27 cm³
weight: 30 g
thickness: 14
resolution: 240 x 240 px
screen size: 1.55 inches
Display type: LCD
Has a display: No
pixel density: 218 ppi
water resistance: Waterproof
Always-On Display: No
has a touch screen: Yes
waterproof depth rating: 1 m
Watch band is replaceable: Yes
Has sapphire glass display: No
Ingress Protection (IP) rating: IP68
has branded damage-resistant glass: No

Battery

battery life: 9 days
has wireless charging: No
has a removable battery: No
Has a solar power battery: No
has a rechargeable battery: Yes

Sensors

has GPS: No
has a compass: No
Has a barometer: No
has a gyroscope: No
Has a cadence sensor: No
has an accelerometer: Yes
Monitors perspiration: No
Has a heart rate monitor: Yes
Has a temperature sensor: Yes
Monitors blood oxygenation levels: No

Features

release date: 2021-07-20
Has a stopwatch: Yes
Has smart alarm: No
warranty period: 1 years
Has call control: No
Has silent alarm: Yes
Has notifications: Yes
Locates your phone: Yes
has voice commands: No
Acquires GPS faster: No
Has vibrating alerts: Yes
Can be used to answer calls: No
Has a built-in camera remote control function: Yes

Connectivity

has NFC: No
supports ANT+: No
supports Wi-Fi: No
has a cellular module: No
Is compatible with iOS: Yes
Is compatible with Android: Yes

Miscellaneous

Is compatible with Windows: No
Is compatible with Mac OS X: No
has an external memory slot: No
has a battery level indicator: Yes
has a socket for a 3.5 mm audio jack: No

App & Software

Has achievements: Yes
Has goal setting: Yes
Has weight tracking: Yes
Tracks water intake: Yes
Has inactivity alerts: No
Has temperature tracking: Yes
Provides activity reports: Yes
Counts how many calories you've burned: Yes

Activity tracking

Measures pace: No
Tracks distance: No
Tracks elevation: No
Designed for golf: No
Tracks your sleep: Yes
Tracks steps taken: Yes
Designed for diving: No
Has a route tracker: No
Has exercise tagging: No
Has multi-sport mode: Yes
Tracks calorie intake: Yes
Provides sleep reports: Yes
Detects activities automatically: Yes
Has a stroke counter for swimming: No

← All Helix watches Helix watches 40–44mm →Browse all brands How watch sizing works →Compare watch sizes →