RT-558
RT-558 স্পোর্টস ব্লুটুথ হেডফোন
Use: Universal for Bluetooth device（as Android/ios mobile phone） Color: Gold/Black \Bule\Red Bluetooth version: 4.2 Job scope: > 10 meters (disabled) Standby time: > 180 hours Lifetime: > 3~4 hours Charging time: 1 hours Support agreement: A2DP, AVRCP, HSP, HFP Frequency response: 20 Hz 20 kHz
