![Bluetooth transmitter](https://helios-i.mashable.com/imagery/articles/076yKhqTk1r7DTZqEK0XIvY/hero-image.png)
TL;DR: As of February 14, get this Bluetooth transmitter and receiver for only $39.99 — that's a 20% discount.
Your wireless earbuds may make listening to music more comfortable, but not everything is Bluetooth-compatible. Whether you're trying to rock out at the gym, listen to...