PRODUCT DETAILS Material: aluminum alloy Output power: 5 W (speaker power) Charging voltage: DC 5V Battery capacity: 1800mAh Product size: 22 * 10 * 12CM Speaker frequency: 100 Hz - 10 kHz Power supply: built-in Li-ion battery Maximum sound pressure level: 115 dB 1 kHz THD 1% Reverb mode: echo reverberation Package included: 1 * microphone, 1 * data cable, 1 * Chinese and English manual About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.