Product information:

Guitar, bass, etc. Wireless transmitter and receiver devices for electro-acoustic musical instruments.
Anti-interface and ultra-short delay give you the best music sound.
Foldable body, more convenient to use and carry.
Built-in rechargeable lithium battery, with USB cable, can work for a long time, easy to charge.
Plug and play, easy to use. Small size, light weight and easy to carry.

Specification:
Frequency bandwidth: 20Hz-20kHz
Transmission delay: less than 4ms
Transmitter battery: 1*3.7V 600mAh rechargeable lithium battery
Receiver battery: 1*3.7V 600mAh rechargeable lithium battery
Charging port: micro USB
Product size: 110*43*17mm

Packing list:
1*transmitter
1*receiver
1*USB cable
1*User Manual