Boscam 5.8Ghz 200mW transmitter. This system is Good for up to 500m flying with the supplied antenna. An optional directional antenna can extend range to 1km+. 

Specification:

• Transmitter frequency: 5645-5945MHz;
• 8 channels selectable: 5705MHz, 5685MHz, 5665MHz, 5645MHz, 5885MHz, 5905MHz, 5925MHz, 5945MHz.
• Transmitting Power: 200mW/23dBm
• Frequency control: Built-in PLL
• Video Format: Pal/NTSC
• Output impedance: 50 Ohm
• Video bandwidth: 0~8.0MHz
• Audio frequency: 6.5MHz
• Video input level: 0.8~1.2Vp-p
• Video input impedance: 75 Ohm
• Audio input level: 0.5~2.0Vp-p
• Audio input impedance: 10K/Ohm
• AV input: analog AV signal input
• ANT connector: RP-SMA (inside the needle)
• Power supply: 6.5-12 volts
• Current supply: 200mA
• Dimension:: 55x26x17mm
• Net weight: 43g
• Gross weight: 52g

• 5.8G : 5705,5865,5665,5645,5885,5905,5925,5945MHZ