Dual Jog Dial.

The SPIDER RT1 a three-button version, and SPIDER ST1 a scroll wheel version, this unit is the perfect entry-level device for first-time buyers, as well as for customers seeking to transition from BT into Mesh. made with Bluetooth technology 5.1. HD Speakers. Audio Multitasking. Mesh Intercom. Wired or boom mic option. Open (9 channels) / Group Mesh. Working distance: up to 2 km (1.2 mi),. Can extend up to 8.0 km (5.0 miles) between a minimum of 6 riders. Talk time: up to 11.5 hours. Sena Motorcycles App.

This helmet is DOT approved and FMVSS 218 certified for legal on-road motorcycle use in the United States.