JBL JR300BT Children's Bluetooth headphone volume control function mounted

Bluetooth version 4.0 Ear cushion material Frog skin PU leather Driver size Dynamic frequency response range (Hz)20 Hz - 20 kHz Impedance (ohms)32.0 Number of drivers per ear Bluetooth profilesHFP v1.5, HSP v1.2, A2DP v1.2, AVRCP v1.5 Bluetooth frequency2.402GHz-2.48GHz Bluetooth transmitted modulationGFSK,π/4DQPSK, 8DPSK Bluetooth transmitter power Battery Type Lithium-ion polyme Maximum music play time with ANC off (hours)10.0 Maximum play time (hours)12.0 Speed Charging time On-ear Rechargeable battery Remote control on ear cups Sound limiting filter Wireless