Features: 57mm full ranged large aperture loudspeaker, enjoy HiFi sound. Small in size and light in weight, with a portable handle that is easy to carry. Bluetooth-compatible 5.0 chip, stable transmission, low power consumption, strong interferences resistant ability, and almost no delay. Humanized design, low noise, quick cooling. Widely used in square dancing, teaching, street performances, children's singing, conference training, camping. Specifications: Material: ABS+Electronics Color: refer to picture to selection please Type: with single mic, with two mic(optional) Loudspeaker: about 85x75x62mm/3.34x2.95x2.44inch Mic: about 135x40mm/5.31x1.57inch Loudspeaker parameters: Bluetooth-compatible version: BLE5.0 Horn diameter: 57mm Loudspeaker power: 6W Working voltages: 3.7V Frequency: 20Hz~20KHz Reverberation: Sound Effect Reverberation Battery specification: 2000mAh Charging time: approximately 2.5 hours Power adapter: DC5V≤1A (compatibility with mobile phones charger) Microphone parameters: Pickup: Back polarized capacitive microphone head Working voltages: 3.7V Frequency: 20HZ-20KHZ Battery specification: 1200mAh Power adapter: DC5V≤1000mA (compatibility with mobile phone charger) Charging time: 3.5-4 hours Package Includes: 1pc Loudspeaker with 1pc/2pcs Microphone(optional) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.