• Bose Frames Alto combine premium sunglasses with built-in Bose speakers for open-ear audio. • Delivers rich, immersive sound while allowing you to remain aware of your surroundings. • Lenses block up to 99% of UVA/UVB rays. • Bluetooth connectivity for seamless pairing with your smartphone or other devices. • Integrated microphone for clear calls. • Rechargeable battery provides up to 3.5 hours of listening time per charge. • Brand new condition.