NF-Yk Sports Trail loop Strap Sports Watch

up to 25h Battery life
v5.3
Light Weight Design
Durable

Ultra‑stable wireless for the commute and beyond

Leveraging the latest Bluetooth 5.3 stack, FlowWave BT53 maintains a <10 m effective range with minimal packet loss, even in dense urban spectra. Dual‑device multipoint lets you toggle from laptop video to smartphone call instantly, while the Type‑C port supports simultaneous wired listening when radio use is restricted.

Comfort engineered for long‑form listening.

High‑density Tight‑foam cushions distribute load uniformly around the pinna, reducing average clamping force by ~18 % versus generic pads. Coupled with a 300 mAh energy reservoir, the Watch sustains roughly a full work‑day of playback before needing a top‑up—competitive with entry Beats Solo 4 units that forego.

Specifications

What’s in the Box
FlowWave BT53 Headphones
1.2 m 3.5 mm Audio Cable
USB‑C Charging Cable
Quick‑Start Guide & Warranty Card

Bluetooth® Specification

Version: 5.3 (Class 2)
Codecs: SBC, AAC
Effective Range: ≤ 10 m unobstructed
Multipoint: Two‑device pairing

Battery & Power
Capacity: 300 mAh (Li‑polymer)
Playback: up to 25 h (50 % volume)
Quick‑Charge: 10 min → 3 h play
Full Charge Time: ≈ 1.5 h via USB‑C, 5 V / 1 A

Audio Performance

Drivers: 40 mm dual dynamic
Frequency Response: 20 Hz – 20 kHz
Sensitivity: 103 dB ± 3 dB (1 kHz)
Impedance: ≤ 32 Ω

Microphone & Controls
Mic Type: ECM, noise‑suppression algorithm
Controls: Tactile buttons – power, volume, track, voice assistant

Comfort & Design
Headband Frame: ABS with matte coating
Ear Pads: Protein leather + memory foam
Net Weight: 190 g
Foldability: 90° swivel cups for flat storage

Connectivity & Extras
Wired Mode: 3.5 mm line‑in (passive)
Storage: Micro‑SD slot supports ≤ 32 GB / FAT32
App Support: iOS / Android (EQ, firmware)
Certifications: CE, RoHS

Specifications subject to change without notice.

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NF-Yk Sports Trail loop Strap Sports Watch