A2 Off Camera Flash Head Battery charging time of 115 min Range of up to 330' (100m) Approx 500 gram Weight Recycling time 0.05-1.3 seconds Battery sustains up to 400 full-power (100w) flashes Compatible with Profoto AirX Instant firmware updates with Profoto Control App Compatible with all A-series batteries Connect Wireless Transmitter Button-free trigger for all Profoto AirTTL lights Attach to your camera's hot shoe to wirelessly connect camera and light Three settings: Auto, manual and off. Auto mode: Point and shoot with automatic flash power. Manual mode: Fine-tune the flash settings Small, lightweight and minimalistic design Smart connectivity with the Profoto app Built-in rechargeable LiPo battery - 30h battery life Up to 100 available air channels Access to absolute power feedback from your lights through Profoto control app