Twins RGB Wireless Speaker is designed for immersive audio experiences anywhere. Specifications: Version: 5.0; DC Power supply: 5V Output power: 2*3W Frequency:2.4GHz-2.48GHz; Signal and noise ratio: ≥ 89db Impedance: 4ohm; Li-ion Output: 3.7V; Lithium Battery capacity: 400mA Speaker Unit(size mm): 45mm Charge time: about 1 hour; Play time: 2-4 hour Working distance: 10m Case material: ABS+PC Dimensions: 68*62*172mm Weight:325g