Transmitter Transmission frequency: 5.8G Transmitting power: 600mw Transmission frequency points: 40 Input voltage: 7-16V Product interface: inner pin (with internal hole antenna) Antenna gain: 2db Operating current: 220mA /12V Operating temperature: -10C to 85C Video format: NTSC/PAL automatic Video bandwidth: 8M Audio bandwidth: 6.5M Due to different batches, the appearance, color, and printed text on the product may vary slightly. This does not affect functionality. Color: As shown in image Material: Plastic Size: 54 x 30 x 10mm Package Contents: 1 x Transmitter Kit Note: Other items not included. Light reflection and differences in display screens may cause slight variations between the image and the actual item color. Measurement error allowance: +/- 1-3cm.