transmitted from the Bluetooth A2DP*1-Source device such as a mp3 player, PC or PDAin the available range. Moreover, you can use the BSH001 mini headphone to remotecontrol the music playing functions of your Bluetooth device if it supportsBluetooth AVRCP*2 in addition...UNIT Dimensions: 38 x 38 x 19 mmWeight: 44 g (1.55 oz.) (Battery Included) SOUND Frequency Response: 20 Hz - 20 KHzSample Rate: 48 KHz, 16 Bit SPL (Sound Pressure Level): 105 dB @ 1 KHzTHD (Total Harmonic Distortion): 0.5 % SNR (Signal to Noise Ratio): 85 dB BLUETOOTH Specification: Bluetooth v1.2 compliantBluetooth Profile Supported: A2DP (Advanced Audio Distribution Profile)AVRCP (Audio Video Remote Control Profile)HSP (Headset Profile)HFP (Hands-free Profile) producing area:China