Bluetooth: V5.0 Wireless Transmission Distance: 10M Signal Noise Ratio: >=90db Battery capacity: 1200mAh Built-in voltage: 3.7VSpeaker driver: ¢45mm*2 Speaker Power: 5W * 2Frequency response: 120HZ-20KHZ Unit Size: 70*83.8*171.7mm Charging: 5V/500mAh