Features: 1. Made of good quality ABS material, the product is durable and long service time. 2. Test Distance: UHF: 8 m, VHF: 5 m. The measurement range is 100-520MHz. 3. This frequency counter can continuously test analog radio signal (handheld radio, wireless phone, etc.) and digital radio signals. 4. Frequency parameters with signal strength can be displayed, which is the best tool for signal testing and radio maintenance. 5. Mini design, lightweight, portable easy to carry. Specification: Material: ABS Color: Black Maximum Range: 3-5km Model: JK-560S Frequency Counter Frequency Range: Based on Radio Walkie Talkie Type: Portable Memory Channel: Based on Radio ISSO Display: Yes Range: Based on Radio Power: 1-30W Frequency Range: 100-520MHz Bidirectional Radio Connector: SMA Internal Antenna Connector Frequency Step: 200K (Digital Radio Signal), 1K, 100Hz Test Distance: UHF: 8 m, VHF: 5 m Measuring Range: 100-520MHz Antenna: Pulling out Antenna Battery: 9V 6F22 Automatic Shutdown Time: 1 minute (Except Digital Signal Devices) Operation : the only one button with all functions Packing List: 1 * Intercom Decoder 1 * Power Adapter 1 * Antenna 1 * Cable