Product: Keypad DTMF Generator Module Audio Encoder Transmitter Board for Arduino
- Operating Voltage: 5-24VDC
- Working current: 6-8MA
- Power interface: 2.1mm x 5.5mm Female Male DC Power Plug
- Audio interface: 2x 3.5mm audio jack socket
- MCU input interface: 7x 2.54MM pin header, GND 5V D3 D2 D1 D0 STD
- Size: 63*40*13mm
- Weight: 16g

The AE11A04 DTMF tone generators are designed for Dialing keyboard AND MCU interfaces. They can be instructed by a MCU (OR Dialing keyboard) to generate 16 dual tones from the Audio 1/2. 16 dual tones are ''1234567890#*ABCD''

Audio 1: This is a universal interface that connects most audio devices. For example: mobile audio interface, PC audio interface, DTMF decoder
Audio 2: This is a specific audio interface. Support the following products of our company: CE004, CE005, CE023, AD22B04, AD22A08

We keep a close eye on consumer needs,offering continual innovation and product development and an ever-changing core product range.Each product undergoes rigorous development and testing,keeping quality and longevity in mind.In addition,our trained customer service team work hard to ensure that any queries are dealt with efficiently and strive to ensure that you are always provided with the highest level of customer support.

Any questions,please contact us through eBay message or e-mail,We will reply within 1-2 business days(public holidays not included).
Working time:Monday-Friday 9:00 AM-5:30PM(Beijing)

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We are happy to be able to offer our customers 60 day returns on our products.All items can be returned and a refund will be issued,provided they are returned within 60 days of receipt of purchase.In the unlikely event that you are not happy with your purchase please do not hesitate to contact our customer services team.

We offer at least 1 year guarantee on all of our products.