Adafruit 4x4 NeoTrellis Feather M4 Kit Pack _RPI_CAM_ACC so this module isn’t suitable

so this module isn’t suitable for long-term use in the USA

these caught our eye since they are solar powered and have a battery backup

Heat set inserts are only a few cents a piece and have a grooved outside

and manage your IoT fleet

Microcontroller ATmega2560 Operating Voltage 5V Input Voltage (recommended) 7-12V Input Voltage (limit) 6-20V Digital I/O Pins 54 (of which 15 provide PWM output) Analog Input Pins 16 DC Current per I/O Pin 20 mA DC Current for 3

Adafruit 4x4 NeoTrellis Feather M4 Kit Pack _RPI_CAM_ACC so this module isn’t suitableWe've upgraded our popular 4x4 Trellis Keypad kit with a super specifically laser cut enclosure that turns your 4x4 'Trellis into a handheld Feather M4 Express powered light music maker! Perfect for your next cool interface, MIDI instrument, control panel whatever could benefit from a glow up with an elegant black and white enclosure and with beautiful diffused colorful buttons. Thee 4x4 button pad board is fully assembled, tested, and communicates