MODUS 600RT MK II Speedlight for Sony Powered by an Extreme Li-Ion Battery Fast recycle time of 1.5 sec (4x faster than AA power) Up to 600 shots at full power Up to 1000 shots at 1/2 power Built-in 2.4GHz wireless receiver & transmitter Unique wireless connectivity High performance 60GN at ISO 100, 200mm TTL, Manual & Multi Modes Firmware update via integrated USB Quick-lock hot shoe Ultra-compact MD1 MK II USB powered charger Kit includes: MODUS 600RT MKII, case & stand 1 x HLX-MD1 Extreme Battery USB powered MD1 Ultra-compact Charger USB cable
eBay