magnet wireless bluetooth
ম্যাগনেট ওয়্যারলেস ব্লুটুথ
Bluetooth vertion:V4.1 Battery:50mA Li-polymer>2hrs Frequency range: 20-20,000Hz Driver unit diameter: 40mm Talk time: 2-2.5hours Built-in microphone
Sound pressure level: 80±3dB
Standby time: over 100hours
Charging time:About 1 hours