Microsoft Screen Sharing for Lumia Phones (Black) AV connectors: HDMI-A4 Charging connectors: Micro-USB Other wireless connectivity: Screen projection, Wi-Fi CERTIFIED Miracast Video resolution: up to 1080p (Full HD, 1920 x 1080) Dimensions .83 x 3.15 inches (21 x 80 mm) (Thickness x Diameter)