Features: Build in sound card, high sound, HiFi sound quality. Bluetooth-compatible 5.0, can connect to mobile phones, computers, televisions, etc. Independent reverberation adjustment makes the sound more three-dimensional. Build in 2000mAh high-capacity battery for long battery service life. Supports external memory cards, which can be used as speakers to play songs. Specifications: Material: ABS+Electronics Color: refer to picture to selection please Size: about 210x70mm/8.26x2.75inch Model: K2 Output Power: 5W Charging: 5V 1000mA Battery capacity: 2000mAh Bluetooth-compatible version: BLE5.0 Package Includes: 1pc Handheld Microphone note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.