TR series: High performance, high compatibility, high-power flash output.
Wireless trigger sensors: Remote sensing CELL 2 mode for off-camera TTL flash sync.
Increase the external power outlet: TR series adds an external power outlet, call back the higher rate to meet your needs.
Quick call back: Full output only 2.9 seconds recycle time, do not apply the new battery can also call back to obtain a rapid rate, only 4-5 seconds.
automatically goes to sleep does not work more than 30 minutes, CPU will automatically shut down.
High-precision output: From 1/128 to 1/1, 8 stalls to lose, each stall have two fine-tuning compensation.
Support high speed continuous shooting: In 1/16 or less brightness, It can support 12EPS high speed continuous shooting.
Power-saving mode: When the flash without any action on the back-light turned off after 20 seconds, 60 seconds when the flash
does not work more than 30 minutes, CPU will automatically shut down.
Overheat protection: built-temperature detection (thermal protection)
Support second-curtain sync: uses a slow shutter for making smear subject, the flash will be off the moment the shutter flash spill, this is the rear-curtain sync function.
FLASH MODE

-Without Automatic AF(assist lamp)
-Manual mode
-Repeating flash mode
-Semi-automatic flash mode 

WORK FOR 
Nikon D4, D3s, D3x, D3, D700, D300s, D300, D200,D100, D90, D80, D70s 
D5200, D3200, D7000, D5100, D5000, D3100, D3000, D60, D40X D800, D600, D7100

Specifications:

Guide number: 36 meters (ISO 100, 35mm)
Circuit design: Insulated Gate Bipolar Transistor (IGBT)
Flash mode: Manual, Slave, S1, S2
Vertical rotation angle: 0 to 90 degrees
Horizontal rotation angle: 0 to 360 degrees
Power: 4X AA Batteries(Alkaline or Ni-MH are usable)
Flash control: 8 grade high-speed control(1/128-1/1)
Recycle time: approximately 2.9s (AA alkaline cell used)
Lighting time: 100-1500 times (using AA alkaline cell)
Color temperature: 5500K
Flash time: 1/200s~1/20000s
Wireless triggering distance: 20-30m indoor, 10-15m outdoor
Additional function: PC synchronous,sniff mode,over-temperature protection
Dimensions: 200 x 75 x 57mm(extended state)
Net Weight: 340g 

Package Included:
Triopo Flash Speedlite TR-981
Travel Pouch
Mini Stand
Reflector
Instructions manual

• All purchases made from this site may be returned in first 30 calendar days after purchase for refund. Buyer is responsible for shipping item(s) back. We don't accept COD or freight collect shipments.
• Please contact us before sending your item back. Please include copy of the invoice with your return package.
• All items must be returned in "as new" condition in the original packaging and include all accessories, blank warranty cards, UPC codes (attached), and user manuals. Original boxes, packing materials, wrappers, and cartons are to be returned without markings, tape, folds or defacing. Products returned in damaged condition will be returned to the customer without exchange.
• If you receive a wrong or defective item please contact us. If found defective a replacement will be shipped immediately under sellers expense.

• Shipping cost to US outside of continental 48 states may vary.
• Buyer is responsible for paying all local customs fees and duties in destination country.
• Usually we ship all items next day after payment has been received.
• We can combine shipping and the shipping fee will be calculated by the item with highest shipping fee + 1/2 shipping fee of the additional item(s). See our other auctions.

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• Payment must be received within 7 days after the auction closed. If payment is not received within 7 days, we will regard the transaction as void .
• Sales Tax will be charged to all orders shipped to California.