Color Black Brand Meyin Model RF-624 Material Plastic Quantity 1 Set Compatible Brand Canon Camera Compatible Models Universal for Canon Camera Effective Distance 200 m Wired/Wireless Wireless Receiver 2 Set Channel 3 Fixed channel and 1 auto channel Sync Time 1/8000s (different camera and flash model swill differ) s Working Frequency FSK 2.4GHz Working Voltage 2.1V ~ 3.3V (2 x AA) V Battery Model AA Battery included or not No Remote Controller Battery Number 2 Other Features Receiver battery consumption: Approx. 50 hours under standby mode (2000mA) Transmitter battery consumption: Approx. 60 hours under standby mode (2000mA) Packing List 2 x RF-624 Wireless Transceiver 1 x English & Chinese Manual