The K31Pro collar‐clip button microphone (wireless earbuds) typically has these specs:
• Model: K31Pro 2.4G wireless earbuds with mic.
• Connectivity: 2.4 GHz wireless transmission (often used for stable low‐latency audio).
• Design: Clip‐on microphone + earbuds with charging case.
• Battery: Usually 4–6 h playback per charge; case extends total to ~20 h.
• Features: Hands‐free calling, noise‐reduction mic, touch control.
• Compatibility: Works with smartphones, PCs, or devices with 2.4 GHz receiver