What can you find in the box is the transmitter, standard stick antenna, connecting cables and short manual.
Transmitter itself has 2 buttons and 2 LED 7 segment displays which are really bright.
Weighting only 8.1 grams without antenna and cables it is suitable for any application like mini quad, RC airplane, flying wing etc.
Antenna connector is placed on the top of transmitter (there is a version with side antenna mount called K22) and it has standard 40 channels transmission divided into well known bands A,B,E,F and R.
Frequency chart is provided in the manual.
Changing band and frequency is really easy with provided 2 buttons on the side of the transmitter itself. One button changes band which is displayed on the first LED while second button changes frequency on that band and is displayed on the second LED display as a number from 1 to 8.
And that is it, select your preferred channel and you are good to go.
Transmitter also provides 5V output for your camera, so you don't need extra power supply for camera.
Working voltage of the transmitter is from 7V up to 20V, that means you can power it with LiPo battery from 2S up to 5S.
Power output is not stated anywhere, just range of up to 3000m. According to that data, I assume that it is 600mW transmitter.
I have connected AKK CA20 camera to the K33 transmitter and picture was excellent.
Also one important thing specially if you going to use this transmitter in the racing quad is latency.
Tested the latency and I couldn't see any delay in the picture (Check part 1 video).
For flight test I had to wait couple of days until weather cleared, but when sun came out I took it to the airfield and mounted to my old BB-J3 Cub RC airplane.
I have used stock stick antenna and had no issues during flight, picture was clear and with minimum or no interference at all.
Link to product: https://www.akktek.com/products/vtx/akk-k33.html?acc=43ec517d68b6edd3015b3edc9a11367b
Video Format: NTSC/PAL
Output Impedance: 50 Ohm
Transmitting distance: > 3000m (open area)
Antenna connector: RP-SMA connector
Operating Voltage: 7-20 V
Output Voltage(VOUT): 5 V
Supply current: 280 mA
Operating Temperature: -10 +85 ℃
Video Band Width: 0-8.0 MHz
Audio carrier Frequency: 6.5 MHz
Video Input Level: 0.8,1.0,1.2 Vp-p
Video Input Impedance: 75 Ohm
Audio Input Level: 0.5 ,2.0 Vp-p
Audio Input Impedance: 10K Ohm
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