1、Accurate Sound: This bluetooth speaker provides defined high and low frequency response, providing excellent audio clarity and providing clean and accurate sound, the retro rotary knob is used to adjust the volume. 2、Wireless Function: This retro speaker has built in wireless function and supports bluetooth device transmission, such as smartphone, laptop, tablet, etc., with a receiving distance of up to 10 meters, less interference. 3、Built in Battery: With simple button control, built in microphone for easy answering and ending calls, equipped with 400mAh lithium battery, providing 2‑3 hours of uninterrupted audio playback when fully charged. 4、Portable Design: The bluetooth speaker has a compact structure, portable design for easy carrying, can be placed on a table or bookshelf, making it suitable for home and outdoor use, can play music in limited space. 5、HiFi Sound Quality: With 360 degree surround sound quality, HiFi grade sound effect 3W speaker, with excellent chip, ensuring a better audio experience, integrating classical and retro design, which is simple and practical. 6、Fast Transmission: This wireless speaker uses a bluetooth V5.0 version module to ensure faster transmission, lower power consumption, strong anti interference ability, with easy connection and free playback. Item Type: Bluetooth Speaker Material: ABS, Metal Battery Type: Lithium Battery (built in battery) Battery Capacity: 400mAh Power Supply Method: USB Interface Small Memory Card Maximum Memory: 8GB (not included) Frequency Response: 50Hz, 20KHZ Receiving Distance: Approx. 10 meter / 32.8ft 1 x Bluetooth Speaker 1 x Charging Cable 1 x Audio Cable 1 x User Manual