Active Noise Canceling Wireless Headphone

Bluetooth Version: V4.0Bluetooth range: 10 m (free space)Transmission frequency: 2.402 GHz-2.48 GHzBluetooth profiles: HSP / HFP / A2DP / AVRCPHeadband Material: metalDriver units: 40mmNoise reduction value: 18dB-20dBMic Size: 4.0 *...