1. Bluetooth version: V3.02. working distance:10meters3， standby time:about 120hours4，playing music4-6hours5，taking time 8-10hours6. charging time 2-3hours7.operating voltage 3.7V8battery :similar lithium battery9.speaker diameter:40mm10.impedance:32��11.support TF card:2-16G12.support FM MP3Picture Time to market: 2015 Style: Headband Line Length: None Resistance: 32�� Package: No Use: Portable Media Player Communication: Wireless Plug Type: Wireless Sensitivity: 120��2dB Connectors: 3.5mm Is wireless: Yes Function: Bluetooth，Noise Cancelling，Microphone With Microphone: No Frequency Response Range: 20-20Hz