AKK K31P

Pretty solid transmitter, It's easy to change channels and the direct solder pigtail is a nice touch. The cable from the antenna pigtail is pretty sturdy and stiff which is nice for quadcopters. Make sure to keep your VTX antenna away from your receiver antennas for the best range and signal quality and DO NOT power this VTX without an antenna connected.

• 40 channels, cover A, b, E ,F, r bands
• It supports full range of 40 channels including raceband
• Easy to use 2 buttons and 2 LED display to change channels and frequencies conveniently.
• Power off memory: replay the very last frequency band and channel
• Super mini, lightweight and durable

Feature:
This 5.8GHz 40CH FPV transmitter has double push buttons for easy changing CH and FR. 
40 channels: Cover A, b, E, F, r bands, Small size and light weight.

Specifications:
Video Format: NTSC/PAL
Output Impedance: 50 Ohm
Transmitting distance: > 3000m (open area) 
Pigtail connector: SMA Male
Operating Voltage: 7-20 V 
Output Voltage(VOUT): 5 V
Supply current: 280 mA
Operating Temperature: -10 +85°C
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

Package includes: 
1X FPV transmitter with Pigtail
1XConnector and cable set
1X Product manual

Notice: The VTX can supply 5V output for Camera. Please make sure your camera is less than 300mA
Please plug antenna before powering on the vtx to avoid static electricity.