boAt Airdopes 138 and Unix UX-999 PRO 2 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Battery life varies between the two (3 / 12 Hours vs 40 Hours), which affects how long you can use them on a single charge. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Impedance levels vary (NA vs 32 Ohms), which can affect compatibility and audio output when used with different devices. From a usability standpoint, both models provide a reliable and premium headphone experience. The frequency response differs (20 Hz - 20000 Hz vs 20Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. There is a noticeable difference in weight (45 Gm vs 20 GM), which may affect comfort during extended use. boAt Airdopes 138 uses Bluetooth 5.0+EDR while Unix UX-999 PRO 2 supports Bluetooth 5.1, which can impact connectivity stability and efficiency.

Verdict: Choosing between boAt Airdopes 138 and Unix UX-999 PRO 2 depends on whether you value better sound, longer battery life, or enhanced features.