1. The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies, with signal strength indicator. 2. This portable frequency counter is designed for counting continuous wave signal comes from two-way radio. 3. There are easy ranges for you to choose. The ranges cover most of the frequency of the two way radios you want to measure. 4. 4 buttons for all function control, its four-button control is easy to use and its small size allows you to carry it anywhere you like. 5. Work by TCXO (crystal) Osc.2~2.5ppm. 6. Use for VHF/UHF walkie-talkies. 7. Auto power off 1-9 minutes. 8. Frequency response time: 0.2-0.5s (CTCSS/CDCSS>0.5-1s). 9. 240*320 pixel color LCD. 10. Digital select digi0.000 or 0.0000. 11. Frequency range: 27MHz-3000MHz (Note: 27-100MHz, it can not be guaranteed and the corresponding normal emission appliance)Specification: General Model SF401 Plus Material PC ABS Voltage 3.7V Battery Types Lithium-ion Battery Size 10.3*7*2.8cm Weight 102g Package Include Package Contents 1 x Detachable Antenna 1 x User Manual 1 x USB Cable 1 x Frequency Counter 1 x Power Adapter Package Weight One Package Weight 0.27kgs / 0.59lb One Package Size 19cm * 13cm * 5cm / 7.48inch * 5.12inch * 1.97inch Qty per Carton 20 Carton Weight 5.80kgs / 12.79lb Carton Size 40cm * 28cm * 27cm / 15.75inch * 11.02inch * 10.63inch Loading Container 20GP: 881 cartons * 20 pcs = 17620 pcs40HQ: 2047 cartons * 20 pcs = 40940 pcs