Bluetooth Speaker Portable Wireless Bluetooth Stereo With Card Insertion Features: 5mm sound unit, restores the essence of music, lossless HIFI stereo sound effect, High-powered full-range speakers, output greater volume, range coverage up to 200 meters, no broken sound, bass output, clean and clear treble. Stunning speakers, 9D subwoofer sound, a combination of a 5W full-range speaker and two subwoofer enhancement units brings fascinating sound quality. Built-in high-speed 5.0 Bluetooth chip + LDS transmission technology, to achieve up to 950kbps audio transmission rate, A2DP technology, connection distance of about 32.8ft, stable transmission, fast connection. Independent multi-function button, simples, high sensitivity ring microphone technology button hands-free call, built-in high-definition microphone, clear and bright sound, hands-free call remote chat, a variety of playback modes, support Bluetooth, plug-in card, AUX multi-mode playback multi-device compatible, memory automatic type connected devices, without repeated. Built-in 1500 mAH battery, battery life up to 24 hours, can be used while charging, charging 1.5 hours, listening to music for 6 hours. Can be a bluetooth selfie remote control. Product Description: Name: Bluetooth speaker Color: Black Size: (Approx)(LxWxH) ：3.22*2.28in Power by: 1 x 800mAh rechargeable battery Frequency Response: 100HZ-20KHZ SNR: ≥70db Distortion: