Description: Value Priced, Efficient Variable Frequency Guitar / Instrument Wireless System. Rechargeable System with replaceable batteries. 15 user selectable variable frequencies allow for use of up to 15 units simultaneously. Most wireless systems on the market have built in rechargeable batteries, these units have replicable AA type rechargeable batteries that are easily replaced by the user, ensuring extended life of the system and excellent value. Additional features are the backlit LCD display Angle adjustable Jack that can be adjusted Flexible antenna avoids breakage form accidental bumps etc. Powerful 4x 1600mAh batteries supplied with the units ensures extended use and 3200mAh of power each to the transmitter and receiver. Technical Specifications: 1) Receiver RX: Receiving sensitivity: -94dBm Audio uses AGC and limiter Working voltage: 2.7~3.6v Working frequency: 610~690MHz Digital Modulation method: P1/4 DQPSK Effective Bandwidth: 300KHz High frequency signal to noise ratio: 96dB Frequency response: 30~20KHz 2) Transmitter TX Maximum transmit power: 10dBm Gain adjustment range: 0~47.5 dB Audio uses AGC and limiter Working voltage: 2.7~3.6v Working frequency: 610~690MHz Digital Modulation method: P1/4 DQPSK Effective Bandwidth: 300KHz High frequency signal to noise ratio: 96dB Frequency response: 30~20KHz Package includes: 1x Transmitter 1x Receiver 4x 1600mah Rechargeable Batteries 2x Charging Cable 1x Instruction manual