The rowin ws-20 guitar wireless system offers a reliable and affordable way to transmit your guitar (or any other electric musical instrument) signal, enabling you to break free from using cables. with an impressive 105db dynamic range at your disposal, crystal-clear sampling at 24bit/48khz, and a frequency range spanning 20hz to 20khz,you can rest assured that the most subtle of nuances with regard to your performance are captured and transmitted with the utmost fidelity. Features: Wireless transmitter & receiver system suits for different electronic music instruments like guitar, bass, etc. 4G uncompressed wireless transmitting, low latency, no signal loss and low noise, and effective transmission range is about 30 meters. Built-in a 1100mAh rechargeable lithium battery, long working hours, and comes with USB cable for convenient recharging,and the USB cable supports 2 instruments charging at the same time. Supports 6 sets of devices working at same time, one-to-one.It is easy to use,pl*g and play. 180° rotatable 1/4” pl*g, available for instruments with input jack in different positions,wildly use for electric guitar/bass/violin/keyboard. Specification: Color: Black/Gold/Silver/Black Silver(optional) Latency: < 12ms Range: about 30 meters Frequency Response: 20-20KHz, +1dB/-3dB Dynamic Range: 105db Power Supply: Built-in 3.7V 1100mA lithium battery Charging: USB port Package Size: 18× 18 × 4cm / 7.1 × 7.1 × 4.6in Package Weight: 285g / 10.1oz Note: The musical instruments showed in the pictures are not included. Please kindly notice active guitars (which use a battery) will not work with this wireless system. Please charge this unit up to 5-7 hours to make sure it is full charged. Please full charge this unit before using it on performance. If you meet the cut out problem please just turn off the WIFI or other strong signal device to avoid the signal interference. Package Includes: 1 x Transmitter 1 x Receiver 1 x USB Charging Cable 1 x User Manual(English)