✅Features:Bluetooth, Micro SD Card Play, FM Radio, Audio Input, APP Control
✅Sound Mode:Stereo
✅Speaker:Customized 40mm Nd Driver Unit
✅Impedance:32 Ohm
✅Sensitivity:108+/-3db
✅Frequency Response:20-20000Hz
✅Input Power:3.7 VDC, 280mAh, Built-in rechargeable Liion Battery 5V DC 500mA, Micro USB charging
✅Operating Time:5-6 Hours
✅Charging Time:Approx. 2 Hours

Bluetooth
✅Version:4.2
✅Transmission Frequency:2402 Mhz to 2480 Mhz
✅Communication Rang:10M(Max)
✅Standby Time:Approx. 48 Hours
✅Profiles:A2DP, AVRCP, HSP, HFP

Micro SD Play
✅Audio Formats:MP3/WAV/WMA
✅Micro SD Card Capacity:32GB (Max)
✅Micro SD Card Format: FAT32
✅Micro SD Card Reader:Yes

FM Radio
✅Radio Frequency Range:88-108Mhz
✅Audio Input:3.5mm(Please DO NOT turn on the device when aux cable connected)
✅Audio Share:Yes, through 3.5mm aux cable