The Phottix Aster Wireless Flash Trigger receiver can connect with the Phottix Aster Set. The Aster transmitter unit emits a wireless radio signal to the Aster receiver unit when the cameras shutter is triggered. This signal fires the flash attached to the receiver, depending on the radio channel selected. The receiver can also be optically triggered with a cameras built-in flash or other flash unit. This allows you to take off-camera flash photographs without using radio triggering. 

Specifications 

-Transmitter battery type: 23A (12V Mini Battery, included) 

-Standby current: 0uA, working current: 1mA 

-Receiver battery type: CR2 3V battery 

-Standby current: 0uA, working current: 600uA 

-Transmitter connection: 3.5 mm socket for PC Sync cord 

-Trigger life: 20,000 times, standby time: one year 

-Receiver connection: 3.5 mm socket for PC Sync cord 

-Flash PC Sync cord with 3.5 mm plug and a 6.3 mm plug adapter 

-Operating distance: W (wireless) mode 30m (100 ft.) in open areas, L (light) mode 10m 

-Sync speed: Varies from 1/125s to 1/250s depending on the sync speed of flashes/strobes and types of camera 

-Operation Frequency: 433 MHz 

Compatibility: 

Most flashes 3-400v with standard flash shoe (except for Sony / Minolta) 

Nikon SB-24, SB-25, SB-26, SB-27, SB-28,SB-28DX, SB-600, SB-800, SB-900 

Canon 380EX, 420 EX, 430EX, 430 EXII, 540 EZ, 550EX, 580 EX, 580 EXII 

Metz mecablitz 48 AF-1 Digital, 58 AF-1 Digital 

Nissin Di866 

Olympus FL-36, FL-40, FL-50 

Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT 

Samsung SET-36ZF 

Sigma EF-530 DG ST, EF-500 DG Super, EF-430 

Sony HLV-F56AM 

Sunpak Auto 2000DZ, 622 Pro, 433AF, 433D, 383, 355AFm 344D, 333D, PZ42X 

YN 460 

Vivitar 3200A, SB-4/283, 285HV 

warranty:6months