specification:

Product Name: Skull Stereo Bluetooth Speaker

Range: shock low-frequency sound effect, listening to music, watching movies and playing games 

Design style: high-fidelity dual speaker design Bluetooth

version: 3.0 NFC

function: support Built-in

battery capacity: 3.7V / 4000mAh

Speaker power: 45W

Frequency response: 120Hz-22KHz

Product Size: about 13 * 10 * 13cm/5.12 * 3.94 * 5.12in

Packing size: about 20.5 * 13 * 12.5cm/8.07 * 5.12 * 4.92in