Check the listing for details. 1pair 2.4G NRF24L01 Wireless Digital Audio Transceiver Module Transmitter Wifi. Condition: New. Listed at 20.10 USD. 1pair 2.4G NRF24L01 Wireless Digital Audio Transceiver Module Transmitter Wifi ParametersVoltage: 5V44.1K sampling rate, 16bit AD sampling to achieve nondestructive high-fidelity digital audio transmission16-channel selectable.Maximum distance 100 meters on open groundWorking current: 50mAWorking channel: 16CHInput impandance: 600 ohmOutput amplitude of the audio signal: 0.3-1vRates: 20hz-20khz Features1. graphic attached in the tital pictures2. connect the power on the item. Input analog signal to the transmitter, then you will receive the signal in receiver3. if the leds on both boards flick twice, the two boards get a pair4. if there is other signal affect the board, please press the button on the transmitter. You will see the LED get flick, and the led on the receiver flick as well, they will jump to another channel. We have 16 channel. Package1pair 2.4G NRF24L01 Wireless Digital Audio Transceiver Module Transmitter Wifi Payment DetailsWe only accept Paypal Payment.We will send the item to you as soon as you won and paid. Delivery DetailsWe provide standard shipping to international via China Post airmail or Hongkong Post airmail with tracking number.Contact us if not receive items.We only ship to the approved address given in Paypal Payment.Please make sure payment address in Paypal is correct.Any non-received items caused by invalid address registered on Paypal are not in our full refund or replacement policy. Returns and ReplacementsWe accept returns and replacements within 30 days from the day the cutomer receive the products.Please make first contact within 30 days from receiving the order.Products should be returned in original condition. About FeedbackWe will try our best to solve any dispute and satisfy our customers.Please contact us firstly if you have any problems.As you know,a negative feedback can deal nothing and the positive feedback is very important for us.So we hope to your understanding.And we will appreciate if you would like to contact us for solving your problems well.Thanks!