Features 1.Long Battery Life: The Bluetooth speaker has built in 1000mAh high capacity battery, providing 6 to 7 hours of long lasting battery life, and you can listen to music for a long time. 2.HD Call: This bluetooth speaker has a built in microphone, you can answer calls directly through it, providing a high definition and convenient call experience. 3.Bluetooth 5.0 Connection: Turn on your wireless speaker and device, search for Bluetooth, select and connect to ZY 010, then start enjoying your music time. 4.Shocking Bass: Upgraded sound quality, more shocking bass, mono speaker improves the bass performance and makes the bass clear, while keeping the small form factor. 5.Serial Connection: This wireless speaker supports dual wireless serial connection system, which can play 2 speakers at the same time, giving you a better music experience. specificationItem Type: BT Speaker Material: ABS Battery Type: Built in 1000mAh Li Ion Battery (Included) BT Version: 5.0 BT Name: ZY 010 Effective Distance: Approx. 10m/32.8ft Power Input: USB C Dual Device Wireless Serial Connection: Turn on both speakers without connecting your cell phone, double click on any one of the two speakers to pair them and connect them together, successful connection will have an indicator light flashes, and a prompt sound, connecting the phone to select a ZY 010 connection can play two speaker at the same time. PackageList1 x BT Speaker 1 x Charging Cable