Our Profoto B10 double Set contains two very small battery-powered 250WS flash heads. It can only be synchronized with the Profoto Air Radio system (Air Sync/Air Remote/ Air TTL). There is an IOS-App to control up to three units at a time. The B10 also features a Bicolor LED modlight with a CRI of 90-95 with about 75 minutes running-time per battery. So the B10 can be used for mixed media jobs like wedding, reportage or trips where filming and photography is needed. The B10 is compatible with the Profoto reflectors system. The B10 can be charged while in use and the charger can be attached to the stand of the B10. Our Duo Set comes with 2x B10 head, 2x mounting, 2x batteries and 2x charger together in a backpack.