Lenovo thinkplus LK40 OWS Open‑Ear Earbuds 

Open Wearable Stereo / Air‑Conduction, Non‑In‑Ear, Ambient‑Aware, Win/iOS/Android, 300 mAh Case

What "OWS" means here: OWS = Open Wearable Stereo — a true‑wireless open‑ear form factor using air conduction (driver sits outside the canal, sound waves reach the eardrum naturally). It is not bone conduction, and not in‑ear TWS — the canal stays open so you hear traffic/voice around you.

Compatible Devices

In The Box

• 1 × thinkplus LK40 OWS Ear‑Hook Earbuds (L + R)

• 1 × Charging Case (300 mAh, Type‑C)

• 1 × Type‑C Charging Cable

• 1 × User Manual 

Product Overview

The thinkplus LK40 is Lenovo's budget‑friendly OWS open‑ear sport commuter — ear‑hook frame, no silicone tip, no canal insertion. Each bud rests on the helix with a soft TPU/antibacterial hook (≈5.4 g) and fires a 13 mm dynamic driver at the ear opening via directed acoustic porting. Bluetooth 5.4 gives stable 10 m linkage; a 35 mAh cell runs ~5.5 h music, the 300 mAh case extends total life to ~18–20 h, full case recharge in 1.5 h over Type‑C. Tuned with a "HiFi/Dolby‑style spatial" DSP preset — vocals forward, modest bass, acceptable leak control at low volume. Target buyer: runner/cyclist/office worker who wants music + ambient awareness without ear fatigue.

Key Features

OWS Open‑Ear Hook — Zero Canal Pressure

• Non‑In‑Ear: Driver housing sits 1–2 cm off the canal; ear canal stays fully open — no occlusion, no sweat trap, no otitis risk for sensitive ears.

• Soft TPU Hook: Antibacterial‑coated, memory‑flex — wraps upper helix, survives "shake test" on sprint/cycling.

• Ambient‑Aware: Car horns, announcements, conversation audible at all times — safer than ANC in‑ears for road running.

Bluetooth 5.4 — Stable 10 m

• SoC: BT 5.4 single‑chip — faster re‑bind, better packet loss vs BT 5.0/5.2 legacy.

• Auto On/Off: Lid‑open → buds wake + pair last host; lid‑close → sleep.

• Latency: "Low‑latency mode" fine for YouTube/short‑video; not a gaming‑grade <60 ms link — expect ~120–180 ms on video.

13 mm Dynamic + Spatial DSP

• Driver: Φ13 mm mylar‑cone dynamic — 20 Hz–20 kHz response.

• Tuning: Mid‑forward (podcast/call friendly), soft V‑shape, "Dolby‑machine spatial" emulation = widened stereo image, not true Atmos.

• Leakage: Directed porting keeps bleed low at <60 % volume; at max volume, person beside you may hear faint vocals (normal for OWS).

5.5 h + Case = ~20 h

️ Lightweight Ergo

• 5.4 g per bud, 55 g case (61.5×73.5×26.7 mm) — pants‑pocket friendly.

• Hook clamp ~0.8 N class — stays put without headache pressure.

️ Technical Specifications

Usage Tips

• Fit Check: Hook goes over the ear, driver pod angled down‑forward toward canal mouth — not pressed on tragus.

• Volume Discipline: OWS needs higher volume than in‑ears for same perceived loudness; keep ≤70 % to limit leakage + protect hearing outdoors.

• Call Quality: Speak normally — ENC cuts wind on bike at <25 km/h; above that, ambient wind still seeps (no physical seal).

• Case Care: Type‑C port is un‑sealed — don't leave case open in rain; wipe sweat off buds before docking.

• Pairing Reset: Hold both touch pads ~5 s until LED blinks → re‑search "thinkplus‑LK40" on host.

️ Important Notes

• OWS ≠ ANC: No active noise cancellation, no passive isolation — subway/train cabin noise will compete with music.

• Not Bone Conduction: Sound is air‑borne from driver to eardrum, not skull vibration — audio fidelity closer to a weak speaker than to in‑ear IEM.

• Bass Roll‑Off: Physics of open‑ear limits sub‑bass; don't expect "thumping" 808s — fine for vocal/podcast/lo‑fi.

• Single‑Host Only: No simultaneous laptop+phone multipoint in stock firmware.

• No Codec Upsell: SBC/AAC‑tier — audiophile LDAC/aptX Adaptive not present.

• IP Rating Unconfirmed: Lenovo CN sheet lists "sports sweat‑proof" marketing, not IPX4 cert — avoid heavy rain, no shower/swim.