Feature: 1. Designed for counting continuous wave signal comes from two-way radio and mobile phones. 2. Also counts digital signal generated by GSM, CDMA and wireless remote control. 3. Can achieve auto switch off, single button control, one button with all functions. 4. With collapsible whip antenna, with stable performance and high reliability. 5. Used for frequency testing of car radios, frequency testing of marine radios, frequency testing of radios for hotels, communities, properties, etc. Specification: Condition: 100% Brand New Item Type: Portable Frequency Counter Material: ABS Color: As Pictures Shown Application: Used for frequency testing of car radios, frequency testing of marine radios, frequency testing of radios for hotels, communities, properties, etc. . Package List: 1 x Portable Frequency Counter(Without Battery) Note: This product does not carry electromagnetic, customers need to prepare a 9V 6F22 battery, remove the back cover, install the battery before using this product.