Pixel Wireless Transceiver for Sony (1 pc)Specifications: Compatible Camera: Sony Brand: Pixel Opas System Mode: Wireless FSK 2.4GHz Distance Range: Up to 400 meters/ 1312 feet Function Mode: Remote to trigger or shutter release Shutter Mode: Single shoot Channel: 4 Antenna: External Trigger Method: Hot-shoe Group Control: 3 different groups Shutter Sync Speed: Up to 1/8000s (Tiny difference depends on different Cameras) Compatible Flash: Original Sony and Metz, Sunpak, Sigma flashgun and Studio light Battery: 2XAA/ 1.2V/ 2400mAh batteries (Batteries are not included) Standby Time: Approx. 400 hrs (with rechargeable battery)Suitable for: Sony Camera Sony A900, A850, A580, A450, A390, A290, A700, A500, A380, A350, A330, A300, A230, A200, A100 DSLR etc Sony A77, A65, A55, A35, A33 SLT etcNote: If it is used on a speedlite, set to RX mode. If it is used on a camera, set to TX mode. If you use this new transceiver with your older one together, camera should be used with the older transceiver together. For some new users, if you don"t have an older one, better to buy two transceivers together. (Check out link picture in the following recommends.)