The SB-N10 Underwater Speedlight Flash from Nikon is compatible with all Nikon 1 digital cameras in their waterproof housings, including the J1 and J2 in the WP-N1, the J3 and S1 in the WP-N2, and the J4 and S2 in the WP-N3. It also works with the waterproof Nikon 1 AW1 camera. It features a depth rating of 100M. The flash helps restore colour accuracy and vibrancy to your underwater images. It offers a guide number of 20M at ISO 100.