Garmin quarter-turn style helmet mounts for devices with a male-ended Garmin base. Built with durable hard plastic material and nylon straps. Accessory compatibility: MJ-6274 Bicycle light compatibility: MOH55/MOH55pro RN 1500/RN 3000 ZX StVZO/ZX Pro StVZO MJ 900S/MJ 902S/MJ 906S RAY 1600/RAY 2100/RAY 2600/RAY 1600B/RAY 2600B ALLTY 400/ALLTY 600/ALLTY 800/ALLTY 1000/ALLTY 1500/ALLTY 2000/ALLTY 1500S MONTEER 3500S/ MONTEER 5000S/ MONTEER 6500S V2.0/MONTEER 8000S V2.0