Suitable for Nikon CLS / COOLPIX​ i-TTL compatible DSLR camera; GN: 58cm; Flash coverage: 18~135mm; Flash mode: TTL / M / RPT; Flash time: approx. 1/1050s (1/1 output); Wireless flash range: indoor: 12~15m / 39.4~49.2inch / outdoor: 8~10m / 26.2~32.8inch; Receiving angle: horizontal: 40 degrees / vertical: 30 degrees; External power supply: CP-E4; Built-in power supply: 4 x AA; Power saving mode.