Features: <br> <br>No power supply needed, plug and play. <br>There is no need to change any part of the original walkie-talkie, just take two handheld walkie-talkies. <br>Use two hand-held walkie-talkie headset jacks to form a very practical small repeater through this relay box. <br>Intelligent operation, easy to use. <br>Lightweight and compact, easy to carry. <br> <br>Specification: <br>Material: ABS <br>Plug: K head <br>Colour: Black <br>Type: Portable <br>Distance: 5-8 km from open space, 1-2 km from densely populated buildings <br>Whether it is two-way: yes <br>Line length: Both sides are 90cm/35.4in long (Left and right) <br> <br>Package list: <br>1 * Relay Box <br> <br>Working Mode: <br>1. Different frequency uplink and downlink difference forwarding (and conventional relay station), A machine as the signal uplink receiver, and B machine as the signal downlink transmitter. The relay has been achieved. <br>2. Two-way forwarding, when the A machine receiver, the B machine transmits. When the B machine receives, the A machine launches. The two-way forwarding function is achieved. <br>3. This relay box is an audio trigger mode. When using it, the volume of the intercom as a receiving signal should be adjusted to the maximum! Single/two-way relay box frequency setting prompt. <br>4. One-way relay box forwarding mode (regular repeater mode)! The A machine receives the signal and the B machine transmits the signal. The receiving/transmitting machine must be set to two different frequencies. The frequency set by the conventional transmitter is higher than the receiver frequency, and the high/low frequency is low. The high/low frequency difference is generally 10M, and the larger the frequency difference, the better. <br>5. Do not reverse the jack of the one-way relay box during use, otherwise the relay box will not work. <br>6. Two-way relay box plug does not divide input/output, two-way relay box forwarding mode: A machine receives B transmission, B machine receives A transmission. <br> <br>Notes: <br>1. This relay box is an audio trigger mode, so please adjust the volume of your walkie-talkie to the maximum when using it, otherwise there may be no forwarding status. <br>2. If the transmission delay time is too long (more than 3 seconds), the transmitter's transmitting antenna is too close to the relay box to cause the transmission signal to interfere with the relay box! The external walkie-talkie antenna can be used to solve the interference problem!1、No power supply needed, plug and play. <br>2、There is no need to change any part of the original walkie-talkie, just take two handheld walkie-talkies. <br>3、Use two hand-held walkie-talkie headset jacks to form a very practical small repeater through this relay box. <br>4、Intelligent operation, easy to use. <br>5、Lightweight and compact, easy to carry.