The Bar Fly 4 Mini is an “out-front” mount made specifically for smaller cycling computers. The modular system mounts your computer, Di2/EPS junction box, and a GoPro mount or Light mount. It is compatible with 31.8mm and 35.0mm handlebars. BF4 Mini is constructed from an advanced injection moulded co-polymer that is strong and weatherproof. It can accommodate up to three accessories at one time: a computer, light, and Di2/EPS Junction box. The computer mount is compatible with Garmin Edge Series 200, 500, 510, 520 - Watches 910XT, Wahoo Bolt, 920XT - Polar M450 - Bryton 100, 300, 310, 330, 530, 10 - One Cateye. Its reach is long enough for most computers up to 3 ¾” long. Larger computers (Garmin 1000 series, Wahoo Elemnt) fit on BF4 MAX. Use this mini mount as a Wahoo mount or a Garmin mount. Included in the box: BF4 Mini composite mount with hardware, 7 Computer heads: Garmin, Polar, Wahoo, Mio, Joule, Cateye, Bryton, GoPro/Finned mount, Light mount, shim for 31.8 handlebars and a Di2/EPS mount. Some bike light companies include a GoPro adapter, others offer it as an option. BF4 MINI mount includes a Junction Box mount if you have electronic shifting. The mount replaces the clamp nut and holds the Box with 2 silicone bands. This accessory is independent of the computer and GoPro adapters.Included in the Box: BF 4 MINI comes with 7 Computer heads for your bike: Garmin, Polar, Wahoo, Mio, Joule, Cateye, Bryton, GoPro Base, Universal Light Mount, shim for 31.8 handlebars and Di2/EPS mount. Durable Construction – BF4 MINI mount is created from advanced injection moulded co-polymer. It is strong enough to keep your electronics where you want them on your bicycle no matter how bumpy the road. Handlebar & Light Compatibility: BF4 MINI is compatible with 35mm diameter bars; with a shim for 31.8mm. 12mm of clamping space on the left side of stem is needed. Universal Light Mount will hold a small flashlight up to 1” diameter with silicone bands. Computer & Camera Compatibility: BF4 MINI includes replaceable heads for Garmin, Wahoo, Bryton, Cateye, Polar and Joule computers. The GoPro base (3-fins) can hold a GoPro camera or any camera or light with a GoPro (2-fins) adapter. Out-front Bike Mount Position: BF4 MINI holds your computer out front and center on your bike for optimal viewing and aerodynamics. In addition, the bike mount will hold a light or camera compatible with a GoPro base, and a Di2 / EPS Junction Box.