3Pcs MAX7219 Dot Matrix Module 4 in 1 Integrated Display Module 4 Dot Matrix Display Module SCM Control Drive Module Driver LED Module Electronic Components 5V 4*1 sold2024 Retevis Acoustic Tube Listen Only

Retevis Acoustic Tube Listen Only Earpiece The distance from the clip part to the coil tube is 9

Compatibility: iPad Pro 12

water bottles

Wait for 2 - 4 hours before use NOTE: ideal tape application temperature range is 21°C to 32°C (70°F - 90°F)

3Pcs MAX7219 Dot Matrix Module 4 in 1 Integrated Display Module 4 Dot Matrix Display Module SCM Control Drive Module Driver LED Module Electronic Components 5V 4*1 sold2024 Retevis Acoustic Tube Listen Only3Pcs MAX7219 Dot Matrix Module 4 in 1 Integrated Display Module 4 Dot Matrix Display Module SCM Control Drive Module Driver LED Module Electronic Components 5V Product parameter Operating voltage: 5V Specification size: 13cmX3. 2cmX1. 3cm (long X width X height) With 32 fixing screw holes, aperture 3mm A single module can drive an 88 dot matrix common cathode A module has input output interfaces Instructions When controlling a single module, you only