King Lucky i21 Purple Open Ear Clip On Earbuds - Comfortable Fit

In this review of the King Lucky i21 Purple open ear clip on earbuds, the bottom line is straightforward: these are a practical choice for runners, gym-goers, and glasses wearers who want a comfortable, noninvasive headphone that stays put. The clip on design keeps the buds secure without inserting into the ear canal, and the single biggest reason to buy is the combination of a snug clip fit with long total playback from the charging case, making them a dependable companion for extended outdoor activity.

Key Features

• Clip on Design: The open ear clip shape provides a secure, snag-free fit that stays in place during running and vigorous movement while avoiding in-ear pressure.
• All-Day Playback: Up to about six hours per charge with roughly 45 hours of total listening using the included charging case to stretch usage across multiple days.
• Bluetooth 5.3: The latest Bluetooth generation delivers a more stable connection and efficient energy use for fewer dropouts during outdoor use.
• Lightweight Build: At about 4.7g per earbud, the i21s are unobtrusive for long wear and comfortable for glasses users who often experience pressure from conventional earbuds.
• IPX4 Water Resistance: A nano hydrophobic coating gives protection from sweat and light rain so workouts and unpredictable weather are less of a concern.
• Easy Reset and Mic: Includes a simple earbud connection reset function and an onboard mic for clear voice calls during activity.

Who It's For

The King Lucky i21 is aimed at active users who prefer open ear comfort over in-ear isolation: runners, cyclists, gym regulars, and anyone who wears glasses and needs a headache-free fit. It also suits commuters who want awareness of ambient sound rather than full noise isolation.

These earbuds are less appropriate for listeners who need strong passive noise blocking or audiophile-level bass and isolation; if you need studio-detail listening or deep noise cancellation, over-ear or sealed in-ear models would be a better match.

Pros & Cons

Pros

• Comfortable clip on fit that stays secure during exercise and works well with glasses.
• Long total battery life when using the charging case, useful for multi-day trips or long training weeks.
• Bluetooth 5.3 provides a stable wireless connection and efficient power use.
• Lightweight construction and IPX4 splash protection for sweat and light rain.

Cons

• Open ear design does not provide strong noise isolation, so bass and passive blocking are limited compared with sealed earbuds.
• Not intended for heavy downpour or submersion due to IPX4 rating.

Specifications

Our Verdict

The King Lucky i21 Purple open ear clip on earbuds are a smart, affordable option for active people and glasses wearers who value comfort, a secure fit, and long combined battery life. They are good value for anyone who wants reliable wireless audio for running and workouts while remaining aware of their surroundings, though listeners seeking strong isolation or heavy bass should consider other form factors.

Frequently Asked Questions

How long do the earbuds last on a single charge?
The earbuds provide about six hours of continuous playtime on one charge, with up to 45 hours total using the charging case.

Are these suitable for wearing with glasses?
Yes, the open ear clip on design is specifically described as comfortable for glasses wearers and minimizes pressure on the ears.

Can I use them in the rain?
They have an IPX4 nano hydrophobic coating which protects against sweat and light rain but are not rated for heavy water exposure or submersion.