Specification:

Item: Microphone

Model: K9

Connection Type: Wirelss

Microphone: Digital Silicon Mark

Sensitivity: -42DB

Frequency Response Range: 20-20KHZ

Transmission Distance: 20m-30m

Transmission Delay: 30MS

Signal-to-Noise Ratio: 64DBM

Battery Capacity: 60MAH

Battery Life: 5-6 hours

Input voltage: 5V

Color: Black

Weight: 11g

Dimensions (L X W X H): 6mm x 3mm x 3mm