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-Frequency range 610.50-669.50MHz -The number of channels A and 30 channels each (conservative value) each time the ID code changes randomly, within the frequency range set by the manufacturer. -Oscillation mode DSP chip frequency lock -Frequency stability ±10ppm -RF power 10dBm -Audio frequency response 40~18000Hz -Distortion ≤0.5% -Battery specifications: Built-in 3.7V lithium polymer battery 9. 3 hours of battery life (depending on battery type and capacity) Second, the receiver technical specifications -Frequency range 610.50-669.50MHz -The number of channels A and channel B are each 3 (conservative value) each time the ID code changes randomly, within the frequency range set by the manufacturer. -Oscillation mode DSP chip frequency lock -Rate stability ±10ppm -Receiving sensitivity -95~-71dBm -Audio frequency response 40~18000Hz -Distortion ≤0.5% -Signal-to-noise ratio ≥90dB -Audio output 350mv (maximum) -Battery specifications: Built-in 3.7V lithium polymer battery -Renewal time, drag one 6 hours; drag two 3 hours (depending on battery type and capacity) Three, use method -When the receiver is turned on, turn on the transmitter to automatically scan the frequency to match the frequency point, without the need for frequency matching. -To change the frequency point, press the SET button of the transmitter. Press once to change a frequency point. The indicator light will flash. There are 30 points to choose from. If the frequency point is selected, the frequency will be automatically scanned and the receiver indicator light will be on. -Drag one by default to channel B (can't switch to channel A), the transmitter lights up in blue, and the receiver also lights up in blue. -The A channel of the second transmitter is red light, and the B channel is blue light. When the second transmitter is turned on, press and hold it for about 8 seconds. The channel indicator will flash, enter the A or B channel conversion state, and the A channel will turn to B. Channel or B channel to A channel. -The drag one or drag two receivers only have a switch button, which automatically adjusts the frequency without any operation. The A channel is bright red for the A channel, and the B channel is blue. -How to use multiple sets of devices: first turn on a receiver, press the transmitter power button and SET button at the same time to turn on without letting go for about 8 seconds A and B channel lights flash, enter the frequency lock state, close to the receiver receiver to receive When the signal is reached, the corresponding channel will be locked (if you drag two, the A and B channels are locked by independent operation). After locking one set of devices, turn off both receiving and transmitting, and then turn on the receiving of another set of devices, and repeat the above operation to lock the set of devices with the transmitter of the other set. In this way, two sets can be used at the same time, and the abov