Cooltone Neck – hanging Headphones delivers crisp, balanced sound with reliable wireless performance for work, study, travel, and workouts. Designed for all‑day comfort, it pairs quickly, holds a stable connection, and keeps you focused with clear audio and an ergonomic fit. Perfect for music, calls, and meetings. Key details: Wireless:V5.4; Support range: 2.402-2.480Ghz Connection distance: 15m Speakers: 10mm, deep bass Speaker size: 10mm Impedance: 16±20%Ω Sensitivity: 95±3dB AT 1K Hz Frequency response: 20-20kHz; Battery: 200mah with IC protection Play time: 10h; Charging time: 2h; Charging connector: TYPE-C.