"Product selling point: 1. Music playback, upper and lower music switching, Bluetooth 5.0, effective transmission within 10 meters, 2 units can be connected in series to achieve left and right channels, and 360-degree stereo surround sound effects. 2. It is suitable for daily home listening to music, watching TV and movies. It can be used as a car speaker or as a home decoration. It is very cute and can be carried with you when you go out to play, ride or exercise. 3. It is suitable for young people to carry at home or travel, suitable for elderly people to listen to music or square dance with use, drivers, mobile phones, tablet audio and video and other crowds. 4. The appearance is small, round and light, and it is easy to carry with the lanyard. 5. Built-in 400mah high-capacity battery, fully charged can be used continuously for about 3 hours, standby time 72 hours. Specifications: Product size: 4.5*4.5*4.8cm Material: ABS Drive device: 1*3.5 full frequency unit Built-in battery: 400mah Frequency range: 520hz-18khz Chip: Zhongke Lanxun AB5377 Bluetooth distance:> 10m Speaker: 36mm 16 core dual magnetic 45W High performance full frequency internal magnetic horn Product color: black/white/blue/green/pink Product list: 1*speaker, 1* lanyard, 1*USB C data cable, 1* manual"