Feature: 1. The speaker driver provides extraordinary sound quality performance to obtain rich deep sound and low harmonic distortion. 2. The built-in 400mAh lithium battery allows you to enjoy up to 4 hours of playing time, and supports playing while charging. 3. The effective transmission distance is 10 meters, the transmission is fast and stable, and it is compatible with a variety of devices. 4. The mini size and portable design make this mini speaker easy to put in your clothes pocket and carry it with you. 5. The mini metal speaker adopts surround sound effects, high-quality accessories, and sophisticated structural design. Specification: Item Type: Bluetooth Speaker Material: ABS + Metal Bluetooth Version: 5.0 Speaker Output: 3W Internal Magnetic Battery Capacity: 400mAh Battery: Polymer Lithium Battery (Built-In) Play Time: 3-4 Hours Transmission Distance: 10 Meters Supports multiple playbacks such as Bluetooth, Memory card, call function, etc. Package List: 1 x Bluetooth Speaker1 x Data Cable