Bluetooth(R) connectivity; Supports profile A2DP; Built-in microphone; On-ear controls; LED pairing/power indicator; Wireless range: 33ft; Driver: 40mm; Freq resp: 20Hz-20kHz; Imp: 32ohm ; Sensitivity: 106dB @ 1kHz SPL; Built-in rechargeable Li-Ion battery; Battery life: 5 hours @ 100% volume; Micro USB port for battery recharge; Includes USB cable, warranty & users guide; Blue;