This product is proudly brought to you by PHOTOGEAR.The new Pixel King radio flash trigger for Nikons i-TTL supports M, BL and FP and offers more impressive features. It is working like a wireless TTL cord and transmits data by radio signals between transmitter and several receivers on distances up to 100m. Energy is provided by AA batteries which can be easily interchanged with most flashes. A USB port enables future firmware updates.Features:Nikons i-TTL, M, BL, FP modes are supportedProvides 3 groups and 7 channelsFlash output power can set between 1/1 to 1/128 on flashes and by group, totally 23 difference levelsTogether with some flashes settings can be done in the cameraSupports high sync speed up to 1/8000s resp. 1/4000sUSB port for firmware updates in futureCompatibilityThe Pixel King is compatible with the following devices:Cameras: D700, D300, D300S, D90, D7000, D3000, D3100, D5000, D5100, D800, D80, D70S, D3S, D3X, D4, D200Flashes: Nikon SB-900, SB-910, SB-800, SB-700, SB-600, SB-400Specifications:FSK 2.4GHz wireless systemOperating range: up to 100mFlash modes: Nikons i-TTL, M, BL, FP3 groups and 7 channels are providedSync speed up to 1/8000s / 1/4000s with high speed sync, otherwise up to 1/250sTransmitter: input by PC sync port or hot shoe, hot plugging supported, no TTL pass throughReceiver: hot shoe transmits TTL, hot plugging supported, cable interface triggeredUSB port for updating firmware or power supplyBatteries: 2 x AA (supports 1.2V rechargeable batteries)Standby time: TX up to 5 years, RX up to 250hWorking time: TX up to 100 hours, RX up to 120hPackage includes:1x Transmitter for Nikon1x Receivers for NikonConnecting cables (BL-3.5)1x Receiver holders1x Hot shoe protectors1x User manual1 year warranty.