Operating mode: Bluetooth
Bluetooth: 3.0EDR
Hat circumference: 58cm
Material: 75%cotton/flax
Size: C58cm*H13.5cm
Audio output: 100mW
Signal noise ratio(SNR): 86db
Frequency response: 100Hz~20KHz
Wireless operation range: 10 m
Rechargeable lithium battery: 110mAH, 3.7V
Mini USB charge, 5V/0.5A
Continuous playing time: 6-8 hours
Speaker sensitivity: 110dB
Speaker Dia: 40mm
Speaker Impedance: 32ohm
Bluetooth controller is round shape, and fixed at back of hats
Packing: Color box each unit
40pcs/ctn
Carton size: 65.5*46*53cm