1、It has advantages of HiFi‑level sound quality, surround sound, high resolution which bring enjoyment. 2、It has high sound quality for its two 4Ω/5W 57mm speakers, bass diaphragm and independent speaker cavity. 3、You can also listen to the broadcast through FM radio, and insert memory card and U disk to play MP3 popular music. 4、With Bluetooth 5.0 high‑performance chip and intelligent automatic pairing, it can reduce power consumption, improve the transmission rate, the sound quality and the signal. 5、The speaker can compatible with Bluetooth devices such as mobile phones, computers, tablets, and other common operating systems. tem Type: AK-205 Wireless Bluetooth Speaker Material: ABS Bluetooth Version: V5.0+EDR Bluetooth Protocol: A2DP, HSP, HFP, AVRCP Signal Transmission Distance: ≤10m/33ft Signal to Noise Ratio: ≥80dB Distortion Rate: <0.3% Speaker Specifications: 4Ω/5WSpeaker Diameter: Approx. 52mm/20.5in Number of Speakers: 2 Frequency Response Range: 100Hz~18KHz Use Time: 4 Hours Battery Specification: Lithium Battery 18650 3.7V/1500mAh (Built-In) Charging Interface: Micro Micro Charging Specifications: DC 5V---2A Audio Input: USB/Memory Card/AUX 1 x AK-205 Wireless Bluetooth Speaker 1 x USB Charging Cable 1 x Manual