Features:

• The HD610 will TTL meter for fast and accurate shooting. 
• Full manual control with 9 stops down to 1.5 watt seconds for amazing finesse with your lighting.
• Shallow depth of field on the brightest day is enabled by 1/8000 of a second flash sync. 
• Relegate the sun to "fill" status with 600ws to make the HD610 your main light in sunlight.
• Freeze action for your fashion or tech shoot, with 1/19,000 of a second flash duration, Freeze mode.
• Shoot for twice as long as others with 6000MAh battery capacity. The rechargeable Lithium-ion polymer battery now comes with its own battery level indicator so you know how much charge there is inside.
• 20 watt LED modeling lamp that is efficient and powerful at 100 watt equivalent tungsten output.
• Group control will let you individually control multiple HD610's for great convenience and faster adjustments.
• iTTL for Nikon and eTTL for Canon users, with front or rear curtain sync.
• Bowens S mount for a huge range of accessories

Specifications:

• Powerful 600Ws (Guide N0. 80M  ISO 100, Standard Reflector)
• Fan Cooled (Auto)
• 20W LED Modelling Light (100W Tungsten Equivalent, 3200K) with double layer insulation glass and aluminium allow radiation fin
• Bowens S-type Accessory Mount
• Built in (removable) 14.8V / 6000mAh Lithium-ion Battery
• Over 450 Full Power Pops Per Battery Charge
• 0.01  2.5 Seconds Recycle Time
• Built in TTL supporting wireless sync control; High speed with E/I TTL
• Flash Modes TTL / M / Multi?
• HSS to 1/8000th
• First Curtain Sync, Second Curtain Sync
• Exposure compensation
• Bracketing AE-Lock Exposure
• Auto Exposure
• Manual Flash  1/256  1/1 Output (1/10th Increments, 9 Stop Range)
• Long Flash Duration Mode  Down to 1/32 Power
• Short Flash Duration (Freeze Mode)  1/800s  1/19000s
• Normal Flash: 1/800s - 1/8000s
• Jinbei 2.4GHz Radio Receiver Built-in
• ETTL & ITTL Radio Slave Modes
• Range 300m + with TR-611 / TR-612 as Transmitter
• Groups  A / B / C / D / E / F
• 16 Channels, 00-15
• Supports Legacy TRS-V / TR-A6 Trigger System (may be limited function)
• Supports Legacy TRS, TRS-V Trigger System (may be limited function)
• Supports TR-611/ TR-612 Trigger system
• Canon/Nikon flash slave control
• Large Color Dot Matrix LCD Display
• Custom Functions
• Auto Memory Function
• Sound Prompt
• Mini USB Port for Firmware Upgrades/ Updates
• 3.5mm Sync Port
• Smaller than predecessor HD600, at only 120mm x 250mm
• Power On time: 1.5s
• Fuse: 30A

 *To achieve 1/8000s High Speed Sync a compatible trigger must be purchased separately. This is optional. Compatible triggers include:

• Jinbei TR-611C (Canon)
• Jinbei TR-612N (Nikon)

Package Includes:

• 1 x HD610 Flash head with LED modeling light
• 1 x Replaceable lithium ion battery (DC 14.8V 6000mAh)
• 1 x Battery Charger
• 1 x Case

Note: Triggers and standard reflectors are sold separately