A 200mW transmitter and receiver is one of the ideal FPV kits.

You get TX351, which is a dip switch to set channels, and TS351, which is a digital display to set the channel.

Small size and lightweight.
High output power, low power consumption, and low harmonic radiation of the transmitter.
Easy 8-channel selection via the micro dip switches.
The transmitting distance is up to 2 kilometers in open areas.
Ideal for FPV, wireless remote control aircraft, wireless remote control vehicles, and so on.

Specifications:
Wireless transmitter     
Model no.     TS351
5.8G 200mW 8-channel AV transmitter
Modulation     Wideband FM modulation
Video format     NTSC/PAL
Output impedance     50 Ohm
Output power     22 dBm (21~23 dBm)
Channel frequency     CH1 5705/ CH2 5685/ CH3 5665/ CH4 5645
CH5 5885/ CH6 5905/ CH7 5925/ CH8 5945 MHz
Operating voltage     12 V (7.0-15 V)
Supply current     150 mA
Operating temperature     -10 ~ +85 °C
Video bandwidth     8.0 MHz
Audio carrier frequency     6.5 MHz
Video input level     1.0 Vp-p (0.8~1.2 Vp-p)
Video input impedance     75 ohm
Audio input level     0.5~2.0 Vp-p
Audio input impedance     10 kΩ
Antenna connector     SMA
Product size     Approx. 5.5 * 2.6 * 1.7 cm / 2.2 * 1.0 * 0.7 in (not including antenna)
Product net weight     Approx. 25 g / 0.88 oz (not including antenna)
Wireless receiver     
Model no.     RC805
Receiving frequency     5725 ~ 5865 MHz; 8 channels
Receiving sensitivity     -90 dBm
Frequency control     Built-in frequency and phase-locked loop
Double lines AV output     Analog AV signal output
Antenna connectors     Inside the needle
Power supply voltage     6.5 V ~ 12 V
Supply current     150 mA
Operating temperature     -10 ~ +50 °C / +14 ~ +122 °F
Storage temperature     -20 ~ +60 °C / -4 ~ +140 °F
Operating humidity     85% RH
Housing color     Black
Product size     Approx. 7.5 * 5.4 * 1.6 cm / 3.0 * 2.1 * 0.6 in (not including antenna)
Product net weight     Approx. 42 g / 1.47 oz (not including antenna)
Total information     
Package size     Approx. 13.6 * 6.7 * 7.2 cm / 5.4 * 2.6 * 2.8 in
Package weight     Approx. 177 g / 6.24 oz