Andoer Oloong 800-RT Wireless Remote Flash Trigger Transmitter Receiver Transceiver TTL 31 Channels 1/8000s for Nikon D5 D500 D4S D750 D7200 D7100 D610 D5500 D5300 D5200 D5100 DSLR Camera One flash trigger, dual-use, can be used as a transmitter and a receiver. Various flash modes, including DT/ I-TTL/ M flash modes. Support front-curtain/ rear-curtain/ FP high-speed sync, the highest sync speed is 1/8000s. 2.4GHz wireless transmission, operating distance can reach up to 100 meters. Support 30 wireless channels and 1 auto channel.