Ultra-long Standby: Built-in large capacity 2200mAh battery, can listen to music for 8 hours continuously NFC function: Support NFC function, convenient to use Bluetooth 4.2 chip: It can transmit data at high speed and bring you smooth music experience. And its low power ensures long lasting battery life, which can be up to 8 hours continuous music time. Simple and stylish: The design is quite simple and stylish Interface: 3.5mm Audio,Micro USB,TF Card Slot,Bluetooth Supports: Bluetooth,Loudspeaker,TF Card Music Playing,Volume Control Compatible with: MP3,TF，USB Joyroom M05 HIFI Bluetooth Speaker Portable FM Radio LED display Subwoofer wireless alarm clock Mini speaker support mobile phone call Product Name: joyroom desktop clock stereo speaker wireless Brand: JOYROOM Model No. JR-M05 Blue tooth version: V4.2 Color: Grey Support blue tooth profiles: A2DP,AVRCP,HSP,HFP Working distance range: 10 meters Frequency: 2.402-2.480GHZ Battery 8W,2200mAh Talking time: about 10 hours. Music time: about 8 hours Standby time: about 150 hours Speaker Impedance: 16ohm Charging Interface: Micro USB Protection Enjoy music, with on/off function Function wireless speaker,AUX Connection Package Content 1x Bluetooth Speaker 1x USB Charging Cable 1x Retail Box