Features 1、No need for power supply, compact and portable, plug and play, easy to operate. 2、No need to change any part of the original walkie-talkie, only two handheld walkie-talkies are needed. 3、Connect to two handheld walkie-talkies with the headset jack to form a practical and small repeater. 4、High quality guaranteed, stable performance, you can use it with confidence. 5、Environmentally friendly and safe, without any harmful substances, you can use with confidence. Specification Item Type: Relay Box Material: ABS Plug: K Plug Colour: Black Type: Portable Distance: 5-8km in open space, 1-2km with densely populated buildings Two-way: Yes Gross Weight: Approx. 101.00g Package Size: Approx. 14x10x3cm/5.5x3.9x1.2in Working Mode: 1. Different frequency uplink and downlink forwarding (and conventional relay station). A machine as the signal uplink receiver, and B machine as the signal downlink transmitter, thus to achieve the relay purpose. 2. Two-way forwarding, when the A machine receives, the B machine transmits. When the B machine receives, the A machine launches. The two-way forwarding function is achieved. 3. This relay box is of audio trigger mode. The volume of the intercom as a receiving signal should be adjusted to the maximum when using. Prompt for single/two-way relay box frequency setting. Package List 1 x Relay Box 1 x Connecting Line