This repeater box is capable of lengthening the communication distance to a great extent, thus letting you hear from partners that far from you clearly and smoothly. Strong interference immunity prevents it from being interfered by other signals. Gives a better signal. Furthermore, it is suitable for underground mine, site construction of cable erection, etc. Features: Walkie Talkie Repeater Box - To create a super long distance walkie talkie communication smoothly and stably. Strong Interference Immunity - Strong interference immunity makes sure a stable and smooth communication without being interfered by other signals. Two-way - Two-way forwarding function makes it support UHF-UHF, VHF-VHF, VHF-UHF, UHF-VHF. Audio Triggering Mode - The volume of walkie talkie should be adjusted to the highest when using. Wide Compatibility - Suitable for underground mine, site construction of cable erection, etc. Specification: Product type: Repeater Box Plug: K plug Two-way: Support Band: Supports UHF-UHF, VHF-VHF, VHF-UHF, UHF-VHF Mode: Audio Triggering Mode Frequency difference: >5MHz Package size: approx. 6.2 * 5 * 2.3 cm/ 2.4 * 2.0 * 0.9 in Package weight: 98g/ 3.5oz Package List: 1 * Repeater Box 2 * Connecting Cables