Custom acoustic architecture with upgraded drivers to deliver powerful, balanced Beats sound Personalized Spatial Audio with dynamic head tracking immerses you in your music, movies and games, tracking the motion of your head for an interactive surround-sound experience UltraPlush on-ear cushions provide lasting comfort and durability, with exceptional passive noise isolation to block external sound The flex-grip headband and ergonomically angled ear cups provide a comfortable fit with ultimate stability to ensure high-fidelity sound can be delivered optimally to your ears At just 217 grams, the headphones’ ergonomic design is so light you can almost forget they’re on Up to 50 hours of battery life so you can listen longer without needing to recharge Fast Fuel means a quick 10-minute charge gives up to 5 hours of playback Dual compatibility for both iOS and Android enables seamless one-touch pairing, automatic pre-pairing across your devices, and Find My or Find My Device Exceptional call quality thanks to multiple digital beam-forming microphones powered by an advanced voice-targeting algorithm. Extended range and fewer dropouts thanks to industry-leading Class Bluetooth High-resolution lossless audio via USB-C or 3.5 mm audio cable Listening via 3.5 mm audio cable requires zero battery power. Tech Specs Length: 6.9 in./17.7 cm Width: 6.2 in./15.8 cm Height: 2.7 in./6.8 cm Weight: 7.65 oz./217 g Form Factor: On-ear Connections: Bluetooth, Wireless Bluetooth Compatibility: Bluetooth 5.3 Power Source: Battery Batteries: Rechargeable lithium-ion Connectivity Class 1 Wireless Bluetooth® USB-C audio 3.5 mm analog input for wired audio sources Battery Beats Solo 4 (single charge): up to 50 hours of listening time Fast Fuel: a 10-minute charge provides up to 5 hours of playback On-device controls ‘b’ button for music and call controls Volume up/down rocker Multi-function button for power and pairing Packaging Beats Solo 4 packaging is made from 100% fiber, sourced from sustainably managed forests