Here are probable characteristics of the VOYX BD-103:
Connector: 3.5 mm audio jack (standard plug) so compatible with many smartphones, laptops, tablets with audio out.
Driver Type: Probably dynamic drivers (common in this range). The driver diameter might be in the ~10-12 mm range.
Frequency Response: Likely standard audio range (approx. 20 Hz to 20,000 Hz), meaning full-spectrum audio (bass to treble).
Impedance & Sensitivity: Possibly around 32 ohms impedance; sensitivity somewhere ~90-100 dB/mW — enough for phone / portable music players without needing a dedicated amplifier.
Cable: Usually a wired cable of ~1.2-1.5 m length; possibly round or flat. Might include inline microphone + call control (play/pause / answer-hang up).
Microphone: Many VOYX wired earphones include mic for calls. If “BD-101” has a mic, it’s likely built into the cable.
Build & Comfort: Lightweight plastic housing, silicone ear tips if in-ear style; tips in various sizes for better fit; basic but functional design.
Noise Isolation: Likely passive isolation (ear tips-seal) — no active noise cancellation.
Durability: Moderate — sufficient for regular use, but not premium materials; cable strain at plug and where cable meets earpiece could be weak points.