1、It has HiFi‑level sound quality, surround sound, high resolution, and 1+1 pairing can be performed through two devices to form a pair of speakers for playback. 2、Equipped with two speakers, bass diaphragm and independent speaker cavity, it owns beautiful sound quality. 3、Memory card and U disk can be inserted to play MP3 popular music, and you can also listen to the broadcast through FM radio. 4、Using 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、Compatible with Bluetooth devices such as mobile phones, computers, tablets, and other common operating systems on the market. Item Type: AK-316 Wireless Bluetooth Speaker Material: ABS Bluetooth Version: V5.0 Bluetooth Protocol: A2DP, HSP, HFP, AVRCP Signal Transmission Distance: ≤10m Signal to Noise Ratio: ≥90dB Distortion Rate: <1% Speaker Specifications: 4Ω/5W Speaker Diameter: Approx. 52mm/20.5in Number of Speakers: 2 Frequency Response Range: 100Hz~18KHz Use Time: 3 Hours Battery Specification: Lithium Battery 18650 3.7V/1500mAh (Built-In) Charging Interface: Micro Micro Charging Specifications: DC 5V---0.5A Audio Input: USB/Memory Card/AUX 1 x AK-316 Wireless Bluetooth Speaker 1 x USB Charging Cable 1 x AUX Audio Cable 1 x Manual