| 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. Bluetooth 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. Single Jog Dial |