Two transmission ways, optic transmission and 2.4G wireless transmission, better to meet your needs. <br> <br> <strong>Features:</strong> <br> Powerful flash with guide number 60m at ISO 100. <br> Supports multiple flash modes M/RPT/Multi. <br> Support high speed sync, 1st curtain snyc and 2nd curtain sync, the maximum shutter sync is up to 1/8000s. <br> Support optic transmission, as a master unit, it can control other speedlights, such as for Nikon SB-900 and SB-910 via optical pulse signal; as a slave unit, it can receive signals from for SB-900 and SB-910 and internal flashing from  D7100/D7000/D800 ect. <br> Support 2.4G RT system, built in 2.4G radio transmitter and receiver, can be used as on-camera master unit and slave unit of 2.4G RT system, compatible with speedlite TT685N, Godox X1N, X1T-N and X1R-N flash triggers. <br> The 2.4G wireless triggering distance can reach up to 100m, better to meet your needs. <br> Support FEC/ FEB functions. <br> Multiple flash groups, it supports A/B/C groups. <br> Supports auto and manual zoom, the flash coverage can be changed between 20-200mm. <br> Sync port and USB port. <br> <br> <strong>Specifications:</strong>
<table border="0" width="741" cellspacing="1" cellpadding="3" bgcolor="#999999">
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<td class="STYLE1" colspan="2" bgcolor="#FFFFFF">Model</td>
<td bgcolor="#FFFFFF">TT685N</td>
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<td class="STYLE1" colspan="3" bgcolor="#999999">Type</td>
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<td class="STYLE1" colspan="2" bgcolor="#FFFFFF">Compatible Cameras</td>
<td bgcolor="#FFFFFF" width="449">for Nikon DSLR Cameras(i-TTL auotflash)</td>
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<td colspan="2" bgcolor="#FFFFFF"><span class="STYLE1">Guide Number</span></td>
<td bgcolor="#FFFFFF">GN 60m(ISO 100)</td>
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<td colspan="2" bgcolor="#FFFFFF">Zoom Range</td>
<td bgcolor="#FFFFFF">20-200mm auto and manual zoom(14mm with wide panel)</td>
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<td colspan="2" bgcolor="#FFFFFF">Adjustable Flash Head</td>
<td bgcolor="#FFFFFF">0~360°horizontally and -7°~90° vertically</td>
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<tr>
<td colspan="2" bgcolor="#FFFFFF">Flash Duration</td>
<td bgcolor="#FFFFFF">1/300 to 1/20000 seconds</td>
</tr>
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<td colspan="2" bgcolor="#999999">Exposure Control</td>
<td bgcolor="#999999"></td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Exposure Control System</td>
<td bgcolor="#FFFFFF">i-TTL autoflash and manual flash</td>
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<td colspan="2" bgcolor="#FFFFFF">FEC(Flash Exposure Compensation)</td>
<td bgcolor="#FFFFFF">
<p>Support Manual.FEB:(1/3rd increments±3stops)</p>
<p>(Manual FEC and FEB can be combined)</p>
</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Multi Flash</td>
<td bgcolor="#FFFFFF">Provided(up to 100 times, 199Hz)</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Sync Mode</td>
<td bgcolor="#FFFFFF">High speed sync / 1st curtain sync / 2nd curtain sync</td>
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<tr>
<td colspan="2" bgcolor="#FFFFFF">HSS</td>
<td bgcolor="#FFFFFF">up to 1/8000s</td>
</tr>
<tr bgcolor="#CCCCCC">
<td colspan="2" bgcolor="#FFFFFF">Flash Mode</td>
<td bgcolor="#FFFFFF">i-TTL /M /RPT</td>
</tr>
<tr bgcolor="#999999">
<td colspan="3">Wireless Flash(optic and 2.4G)</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Wireless Flash Function</td>
<td bgcolor="#FFFFFF">Master, Slave, Off</td>
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<td colspan="2" bgcolor="#FFFFFF">Controllable Slave Groups</td>
<td bgcolor="#FFFFFF">3(A/B/C)</td>
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<td rowspan="2" bgcolor="#FFFFFF" width="128">Transmission distance(approx.)</td>
<td bgcolor="#FFFFFF" width="142">Optic</td>
<td bgcolor="#FFFFFF">
<p>Indoors:12 to 15m</p>
<p>Outdoors:8 to 10m</p>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">2.4G</td>
<td bgcolor="#FFFFFF">100m</td>
</tr>
<tr>
<td rowspan="2" bgcolor="#FFFFFF">Channels</td>
<td bgcolor="#FFFFFF">Optic</td>
<td bgcolor="#FFFFFF">4(1,2,3 and 4)</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">2.4G</td>
<td bgcolor="#FFFFFF">4(1-32)</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Slave-ready indicator</td>
<td bgcolor="#FFFFFF">Two red indicators blink</td>
</tr>
<tr>
<td colspan="3" bgcolor="#999999">Auto Focus Assist Beam</td>
</tr>
<tr>
<td colspan="2" rowspan="2" bgcolor="#FFFFFF">Effective Range(approx.)</td>
<td bgcolor="#FFFFFF">Center:0.6m-10m</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">Periphery:0.6m-5m</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Power Supply</td>
<td bgcolor="#FFFFFF">4 * AA Alkaline or NIMH battery(Not included)</td>
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<tr>
<td colspan="2" bgcolor="#FFFFFF">Recycle Time</td>
<td bgcolor="#FFFFFF">Approx 0.1-2.6s</td>
</tr>
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<td colspan="2" bgcolor="#FFFFFF">Sync Triggering Mode</td>
<td bgcolor="#FFFFFF">Hotshoe,3.5mm sync line, wireless control port</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Color Temperature</td>
<td bgcolor="#FFFFFF">5600±200K</td>
</tr>
<tr bgcolor="#999999">
<td colspan="3">Dimension</td>
</tr>
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<td colspan="2" bgcolor="#FFFFFF">Item Weight</td>
<td bgcolor="#FFFFFF">412g / 14.6oz</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Item Size</td>
<td bgcolor="#FFFFFF">19 * 7.5 * 5.0cm / 7.5 * 3.0 * 2.0in</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Package Weight</td>
<td bgcolor="#FFFFFF">530g / 18.oz</td>
</tr>
<tr>
<td colspan="2" bgcolor="#FFFFFF">Package Size</td>
<td bgcolor="#FFFFFF">20 * 9 * 8cm / 7.9 * 3.5 * 3.1in</td>
</tr>
</tbody>
</table>
<br> <strong>Package List:</strong> <br> 1 * Speedlite <br> 1 * Carrying Bag <br> 1 * User's Manual(Chinese /English)