Feature: 1. Upgraded BT5.1 chip provides fast and stable connection, low latency, strong anti-interference ability. 2. Adopt high fidelity speaker unit, the bass is deep and powerful, and the music rhythm is exquisite and present 360° surround sound. 3. 360° slide cover design, just press and push it to get musical experience you want. 4. Small size, easy to put in your bag. Equipped with lanyard, the speaker can be suspended from handlebar or backpack. 5. Widely compatible with mobile phone, tablet, laptop and other BT-enabled devices. Specification: Features: Upgraded BT5.1 chip provides fast and stable connection, low latency, strong anti-interference ability. Adopt high fidelity speaker unit, the bass is deep and powerful, and the music rhythm is exquisite and present 360° surround sound. 360° slide cover design, just press and push it to get musical experience you want. Small size, easy to put in your bag. Equipped with lanyard, the speaker can be suspended from handlebar or backpack. Widely compatible with mobile phone, tablet, laptop and other BT-enabled devices. Built-in 600mAh large capacity lithium battery in the charging case, long endurance time. Specification: Type: 2-in-1 BT headphone speaker Color: Black/White(optional) BT version: V5.1 Transmission distance: About 15-18m(barrier-free) Single earbud battery capacity: 40mAh Charging case battery capacity: 600mAh Item size: 9 * 5.8 * 5.8cm /3.54 * 2.28 * 2.28in Packing list: 1 * Speaker 2 * Earbuds 1 * Charging cable 1 * Lanyard 1 * User manual Package List: 1 * Speaker 2 * Earbuds 1 * Charging cable 1 * Lanyard 1 * User manual