Made for the H2400P flash head, the P2400 Power Pack from Godox is a powerful energy source with a 32-channel, 16-group receiver that allows triggering with an optional transmitter at distances up to 1000'. The pack has very fast full-power recycling of 0.7 seconds and a super-fast 1/17,800 second (t0.1) flash duration for stop-action shooting of items like water splashes.