JBL Tune 520 BT White (T520BTWHTEU) Headphone Connectivity Technology Bluetooth Headphone Type On-Ear Microphone Yes Number Of Speakers 2 Driver/Speaker Diameter 33 mm Frequency 20 - 20 000 Hz Sensitivity 102 dB Impedance 30 Call Controls Answer / End Call Volume Control Yes Bluetooth 5.3 Type Of Battery Li-Ion Battery Description 450 mAh Charging Time 2 hours Music Playback Time Up to 57 hours Color White Dimensions (Height x Width x Depth) 21 x 23 x 5 cm Weight 147 g