Bluetooth codecs determine wireless audio quality:
**LDAC** (Sony): Up to 990kbps. Highest quality wireless codec. Available on Android, not iPhone. Supported by Sony and Sennheiser headphones.
**aptX Adaptive** (Qualcomm): Dynamic bitrate up to 420kbps with low latency. Available on Android, not iPhone. Supported by Sennheiser and many others.
**AAC** (Apple): Up to 256kbps. The only Bluetooth codec iPhone supports well. All recommended headphones support AAC.
**SBC** (baseline): Up to 345kbps. The default fallback codec. Avoid relying on this for quality listening.
Multipoint Bluetooth lets you connect to two devices simultaneously, switching seamlessly between phone calls and laptop audio. All three picks support multipoint.
Battery longevity over years matters. The Sennheiser MOMENTUM 4 and Cambridge Audio P100 both have user-replaceable batteries, meaning you can swap in a fresh battery after 2-3 years instead of buying new headphones.