Product description Material: plastic Size: 120*30*60MM Color: black painted, black, red Battery capacity: 300mAh Signal to noise ratio: 75dB Frequency response range: 60Hz-16KHz Package content: 1*Mini card Bluetooth speaker ring 1.Astonishing SoundDelivers breathtaking stereo sound with exceptional clarity and zero distortion from the dual precision stereo drivers and proprietary bass radiator. 360 all around sound effect offer stereo sound. Alone bass port boost low-end frequencies to make the beats hit even harder. 2.Advanced Bluetooth 5.0Our advanced antenna design with Bluetooth 5.0 provides fast connection and an extended wireless range , the built-in microphone function will maintain a clear sound quality. Connecting in seconds to devices, it can ensure the most perfect sound quality transmission in a barrier-free environment, guarantee no delay in playback. 3.Worry-free Battery LifeUsing the included cable to charge in 2 hours. When it is fully charged the battery will automatically stop charging. The built-in high efficiency 300mAh lithium-ion battery can be used to 6-8 hours. Wireless portable bluetooth speakers should be a must have in your life. 4.Compatible with multiple modes of playbackMicro (TF) card playback, support mp3, wav format, support memory playback. 5.Convenient to carryMini music box, put the music in your pocket, portable mini bluetooth speaker only 120*60*30mm, small man with big energy, enjoy music anytime, anywhere.