ROCKBROS Bluetooth Polarized Sunglasses Music Speaker Cycling Glasses Outdoor Sport Color:Black The gasket design prevents water

The gasket design prevents water

[Easy Installation]-This bike handlebar extender can be installed on normal size(20mm) and up to over size(32mm)handlebar

Fitting neatly into your road bike's handlebars for safe transportation on your weekend ride

It can withstand regular usage very well and is rust-resistant

ROCKBROS Bluetooth Polarized Sunglasses Music Speaker Cycling Glasses Outdoor Sport Color:Black The gasket design prevents waterBrand: ROCKBROS Product name: Sport cycling bluetooth eyeglasses Material: TR grame+TAC polarized lenses Bluetooth version: Bluetooth V5. 2 Bluetooth protocol : A2DP AVRCP HFP HSP SPP GATT HOGP PBAP Audio decoding: SBC AAC Bluetooth distance:< 10m Battery capacity: 120mAh Music duration: About 6h(100%volume) Standby time: about 60H Call duration: About 5h(100% volume) Charging time: About 2h Charging imput: DC5V Product function: Bluetooth audio\voise