ATtiny85 - AVR 8 Pin 20MHz 8K earth magnetic field but you can change it

but you can change it with AT command

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We were able to control LEDS wirelessly using the shield  within more than 80 Meter range easily (See Video Below)

Each electrode is essentially just a conductive pad coated with adhesive gel and terminated on the opposite side with a snap connector

It outputs all the pinout of the Arduino Mega in addition to connection expansions to various sensors and modules at the same time

ATtiny85 - AVR 8 Pin 20MHz 8K earth magnetic field but you can change itAtmel's itty bitty ATtiny85 8 Bit Processor. 8K of program space, 6 I O lines, and 4 channel 10 bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. Atmel ATtiny85 Datasheet