The accuracy comparison between this signal source and professional comprehensive measurement is basically the same. The accuracy is very high. Can test the actual receiving sensitivity of the walkie-talkie. Features: Suitable for FM walkie-talkie debugging. Built-in 800Hz audio modulation, with the analog digital CTCSS function. The unit is DBM. General hand sensitivity is -120DBM to -130DBM. The greater the sensitivity to a negative number, the higher the sensitivity. The signal source cannot input power. It is forbidden to press the intercom button to transmit when testing. (self-matching power supply 8V-12V power supply polarity is positive and negative) Specifications: Material: ABS Color: blue Frequency: 0.5MHz-470MHz Signal strength: -70-132dBm Built-in 800Hz audio modulation Add the analog digital CTCSS function Use 8-12V DC power supply, frequency 7 digits For example: 439.6000MHz shows 4396000KHz Signal strength -70-132dBm valid, other values are invalid. Audio modulation is only about 800Hz, other values are invalid. Item size: 155 * 120 * 63mm / 6.1 * 4.7 * 2.5in Item weight: 271g / 9.6ounce Package size: 210 * 160 * 70mm / 8.3 * 6.3 * 2.8in Package weight: 303g / 10.7ounce Test methods: During the test, the frequency of the signal source input transceiver is first set to -100DB or any value. The intercom has audio output and then reduces the output strength of the source. For example, the -120DB just heard the intercom audio signal but there was noise. The audio signal just hears that the -120DB value of this output is the receiving sensitivity of the radio. Package list: 1 * 0.5MHz-470MHz RF Signal Generator for FM Radio 1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. 2) Payment must be made within 3 days of order. 3) If you can't checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days. 1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO) 2. Orders processedtimely after thepayment verification. 3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. 4. The images shown are not the actual item and are for your reference only. 5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season. 6. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction 7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. 1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS Shipping cost is bear by both seller and buyer in half. 2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po . 3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from . OR, you may choose to have a replacement. 4.We will bear all the shipping cost if the product(s) is (are) not as advertised. 1. 12 months Manufacturer`s limitedWarranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty. 2. Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on We maintain high standards of excellence and strive for 100% customer satisfaction Feedback is very important We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them