Model: E-330 Speaker specifications: 52mm*2 Speaker power: 5W*2 Support playback mode: TF card, U disk, AUX wired, Bluetooth Power capacity: 1200mAh lithium battery Play time: About 3 hours Audio signal to noise ratio: ≥90db Wireless transmission range: 10 meters Size: 75.5*75.5*161.6mm