Toshiba Wireless Headphone RZE-BT180H ((RZE-BT180H (K)BLACK)- Frequency Response: 20Hz - 20KHz, Connectivity: Bluetooth Specifications: Ver. 4.2 + EDR, Bluetooth Protocol Support: A2DP, AVRCP, HFP, HSP, Two Bluetooth Devices at the same time, Phone: Receiving and Answering the Call, Features: Accessories: USB Charging Cable, Line in Cable, Operation Manual, Charging Way: USB DC5V, Service Distance: Up to 10m (33ft), Weight: 174g, Colour: Black