Accessory Type Camera Flash Accessory, Compatible Brands Universal Compatible Models Universal Features Wireless Flash Control Interface Hot Shoe 1.Low voltage working make sure that high level of safety and no damage to camera. 2.High-speed and synchronous for 1/200 second 3.Max. working distance: 30M (open area, without interference) 4.Support with Umbrella reflecter 5.16 selected working channels 6.Transmitter is with changeable 23A battery 7.This transmitter is relatively small and unobtrusive compared to a PocketWizard. 8.The receiver works with AAAx2 batteries power supply, and decode with microprocessor. 9.One Transmitter can control as much Receivers as you want at the same time. Specification Power:23A(Transmitter), CR2(Receiver) Range: >30M(Transmitter), >30M(Receiver) Channels: 16 Operation Frequency: 433MHz Sync speed: 1/200 sec. ا SELF COLLECT (At following MRT stations ONLY) MONDAY to FRIDAY - Public Holiday not include: Tradehub 21 Jurong East Bukit Batok Bukit Gombak Chua Chu Kang Yes Tee Kranji Marsiling Woodland Admiralty Sembawang Yishun SATURDAY and SUNDAY Other places besides yishun up to seller convenience only MAILING Normal Mail - $2 Registered Mail - $4 Note: Seller NOT responsible for wrong address provided, lost or damaged item while in transit via mailing. Registered mail you will be given a tracking number. (WARRANTY) NO refund or change of mind after making payment. Seller not liable for any form of damages when and after using our products.