【Bluetooth Connectivity】Enjoy a stable and fast connection with Bluetooth transmission distance of up to 10m, supporting seamless audio streaming from any Bluetooth-enabled device 【Multifunction】With FM radio function, support TF card and U Disk, also support AUX input function, convenient to use 【High-Quality Sound Performance】Delivers smooth, clear, and dynamic sound with varying levels for a premium audio experience, whether you're listening to music or taking a call 【Hands-Free Calling】Connect your mobile phone or tablet via Bluetooth to play music and enjoy hands-free calls, enhancing convenience 【Long-Lasting Battery】Powered by a 4400mAh rechargeable battery, offering long usage and standby time, so you can enjoy music for longer 【Portable with Shoulder Strap】Comes with an adjustable shoulder strap for easy carrying, perfect for outdoor activities or travel Specifications: Bluetooth version: V5.0 Transmission range: less than 10m Sound to noise ratio: ≥90db Battery capacity: 4400mAh Built-in voltage: 7.4V Playing time: 8H~12H Speaker power: 4Ω/15W*2 Frequency response: 100hz-20khz Product size: 292*132*139mm Product weight: 1600 grams Charging voltage: 5V/2A