No box. Comes w brand new battery. Hell with the prices they charge for these CR2032s these days and the l’il screws to put the battery in, that makes this doggone thing a bargain!

See pics for the proof of proper functioning

Note: these are ANT units, not Bluetooth

Garmin heart rate monitors are consistently more reliable, accurate and higher quality than Wahoo, or Polar. Wahoo is garbage