Instructions: Turn on the switch, plug the TF card, according to your needs to adjust the volume, and you also can choose a loudspeaker or insert headphone.
Features: Adjustment method: Press Features: Bluetooth audio input, Bluetooth hands-free calls, LINE IN, TF card Power supply: DC 5V, lithium battery (400mah) with double insurance Effective power: 3W Speaker unit: âˆ?5MM Signal to noise ratio:> 80DB Distortion rate: <0.5% @ (1KHz) Frequency: 90Hz-20KHz Audio Interface: 3.5MM Impedance: 4Ω Playtime: 1Hours Speaker Size: âˆ? 60mm, H: 65mm Speaker weight: 200G Bluetooth version: Bluetooth2.1 Working frequency: 2402-2480MHz Carton size: 33 * 33 * 32.5cm Package Content: