Mefe Rechargeable Wireless Guitar System Guitar Bass Wireless Digital Transmitter Receiver 100 Channels Description MEFE MS -1 uses digital UHF radio frequency wireless transmission technology, with strong anti-interferenceability, through the obstacles of strong, stable transmission BuKa etc in order to avoid signal attenuation, wireless system should be close to acting area as far as possible, and with a large metal, metope, scaffolding and other objects at least keep a distance of 1.5 meters, and as far as possible to ensure thatthe between transmitter and receiver are empty signal direct way. Specification: Dynamic range: >=90dB Latency: =85dB Charging time: about 2.5hours (5V1Aadapter) System frequency response: 30〜18KHz Frequency range: 500-940 fTlhZ(specific range varies from region to region) Read more Battery Indicator: You can double-click the front button to see the current power in case of low battery. Note: When the first light flashes, it indicates that the power is 0-25%. At this point, the transmitter (receiver) needs to be charged. Dual-ended USB cable included, it could charge both the transmitter and receiver. Connection: 1. This product has been set by default before delivery and can be used directly after starting up. If the product can't be used directly, try to reset the code. 2. When multiple sets of equipment are used at the same time, it is possible to use the same frequency and may interfere with each other, if there is interference, you can press the channel button to switch channels. 3. When a transmitter connected with multiple receiver or transmitter and receiver are not the original equipment can be long press on the code button to red light flashing, when transmitting terminal and receiving end normally on a green light, namely to code success! 100 Channels: 100 Channels for more devices, automatically match unoccupied channels when press the key on transmitter. Package Included: 1 Transmitter 1 Receiver 1 Dual-ended USB Charging Cable 1 User Manual Read more Features: Outstanding Transmission: 50m long range, stable signal, delay