AFK BT528 Bluetooth Speaker with Ambient Light,Support TF Card,U-Disk - Black ?Advanced Bluetooth chip and circuit design techniques,compatible with all wireless devices ?FM function,you can search automatically broadcast radio stations ?With HI-FI speaker,to ensure clear and bright sound ?Support TF card and USB card,play audio with MP3 mode ?The distance range is about 10 meters ?With a built-in AUX line,you can directly connect external devices,such as a tablet PC/TV/cell phone ?It will turn off automatically if you disconnect Bluetooth for 5 minutes ?Support dual speaker output,allowing you to connect two speakers simultaneously and enjoy a more immersive music experience Specifications: ?Model: BT528 ?Bluetooth Version: 5.1 ?Support L2CAP /A2DP IAVRC Perceive AUDIO signal and control the AUDIO device ?Supports HSP /HFP (hands-free),built-in microphone for hands-free calls ?Connection Distance: 10M approx ?SNR: 90dB ?Battery: 2400mAh 3.7V 8.88Wh ?Play Time (100% volume): 4H ?Charging Time: 4-5H ?Speaker Size: 45mm*2 ?Power: 4|?/5W*2 ?Frequency: 120HZ-20KHZ ?Input: 5V-1A ?Size: 73 x 156mm ?Weight: 480g Package included: ?1 x Speaker ?1 x USB Charging Cable ?1 x English and Chinese Manual ?Other items not included