The Rockbros SP-251 cycling glasses combine TAC polarized lenses with a Bluetooth 5.2 wireless audio system. The two built-in speakers play music, navigation directions, and calls without covering your ears, while letting you hear the sounds around you. The touch controls let you manage music and calls and use a compatible voice assistant.

The polarized lenses reduce glare from roads, water, snow, and glass. The TR frame has curved arms and an adjustable nose bridge, while the magnetic connection makes charging easy.

• Frame color: Black
• Frame material: TR
• Frame shape: Semi-rimless
• Lens type: Polarized, clear
• Lens material: TAC
• Use: Road cycling
• Weight: 43 g
• Bluetooth: 5.2
• Bluetooth protocols: A2DP, AVRCP, HFP, HSP, SPP, GATT, HOGP, PBAP
• Audio codecs: SBC, AAC
• Bluetooth range: Up to 10 m
• Speakers: 2
• Battery capacity: 120 mAh
• Music playback time: Approximately 5.5–6 hours at 100% volume
• Talk time: Approximately 5 hours at 100% volume
• Standby time: Approximately 60 hours
• Charging time: Approximately 1.5 hours
• Charging connection: Magnetic, 5 V
• Controls: Touch
• Adjustable nose bridge: Yes