Reviews Adjustable Frequency

ICQUANZX XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude

Lightweight and portable 208/220/240/ 1PH and 3PH unit.
Digital/Micro-controlled // 320A/ 20V @ 60% Duty Cycle/ 40º C.
AC Wave Forms: Advanced Square /Soft Square / Triangular / Sine.
DC Pulse Frequency: .1-500 Hz / Standard AC Pulse Frequency: .1-250Hz.
Hot Start Amps: 0-100% Stick : Adjustable Arc Force Control Stick Hot Start Typ:Adjustable Hot Start.

Frequency Response - 10-25,000 Hz and Impedance - 250 ohms.
Dynamic element for extended frequency response.
Closed leatherette ear cushion for maximum isolation and deep bass.
Adjustable, vinyl-covered headband adapts to individual head size, Ultra durable for daily use.

This is a PIC microcontroller based on the frequency meter, with a crystal measurement function and programmable addition and subtraction frequency settings..
Five digital display, easy and intuitive, all use of in-line components, the circuit is simple and easy to produce..
You need to solder and assemble by yourself, all the components are directly inserted, and the wire is printed correctly according to the PCB. After welding, the signal is input with the standard signal source, and the yellow adjustable capacitor is adjusted to make the display value equal to the signal frequency..
The power supply can use a USB to 3.5mm power cable, or you can directly input a 5-9V DC power supply at the - and + pads..
It can measure the frequency range from 1 Hz to 50 megahertz (1Hz-50MHz), can measure the oscillation frequency of most common crystal oscillators, and measure equipment such as radio transceivers..

Adjustable Sensitivity & Frequency - The anti barking device has 4 levels of sensitivity and 4 levels of frequency (15KHZ-30KHZ) adjustable. Different dogs may be sensitive to ultrasound in different frequency bands. Please turn the knob to test different frequency bands for best results. The dog device is suitable for dogs between 6 months and 8 years of age, except for dogs with hearing impairments or under 6 months and special large dogs..
USB Charging and Waterproof - Bark controller has IP4 level waterproof, the case is UV resistant and not easy to fade. It can be easily hung on a tree, indoor, outdoor wall or fence to stop any dog barking. And it uses USB charging, it can last at least a week on a single charge, no need to buy batteries frequently, saving you money..
Safe for Dogs and People - The Bark Control uses ultrasonic technology to allow humans to hear slight sounds but not affected by the sound, but dogs will be sensitive to these ultrasonic waves and other family members or neighbors will not worry about being affected. Ultrasounds do not inflict substantial penalties on dogs. Different dogs may be sensitive to ultrasound in different frequency bands. Please turn the knob to test different frequency bands for best results..

Rockville RKI65BT Dual UHF Wireless Microphone w/ Karaoke Interface+Mic Mixer. Connects to any home audio receiver, television iPads, computers, and more. Bluetooth input. 3.5 mm aux input..
Optical input. Coaxial input. ¼” TS mix output Output passes through the signal of all the mics, as well as any input device. 3.5 mm aux output passes through the signal of all the mics, as well as any input..
2 UHF wireless microphones with 8 switchable frequencies. Each mic has a nice heavy feel to it and has a digital display making it easy to switch frequencies. Adjustable echo level. Adjustable tone control. Adjustable music input volume..
Independent adjustable Mic levels. Wireless frequency range:. Mic A: 556.1 558.4 560.7 562.2 564.5 566.8 568.3 570.6. Mic B: 574.1 576.4 578.7 580.2 582.5 584.8 586.3 588.6..
Number of channels: 8. THD: 0.5%. Signal/Noise ratio: 90dB. Frequency response : 30 Hz - 18kHz ±3dB. Operating range: 200 Feet. Transmitting Power: 10dBm. Power Supply: 3V (2 AA Batt). 100-240V compatible with included micro USB power cable (5 feet).

Extra Accessories: Garrett 8.5" x 11" Search Coil Cover, ClearSound Headphones, Garrett ACE Rain Cover.
Also Includes: Garrett 8.5" x 11" PROformance DD Waterproof Search Coil, Adjustable Arm Strap, Garrett ACE 400 Instruction Manual, Garrett Search Coil Hardware Kit, 4 "AA" Batteries Included, FREE Garrett Catalog, FREE Garrett Searcher Magazine, Exclusive 2 Year Warranty.
Includes Electronic Pinpointing: precisely locates targets and speeds recovery Notch Discrimination: Modify discrimination patterns based on what you are seeking..
New Adjustable Frequency, New More Stable Camlocks, Enhanced Iron Resolution.
2 year Warranty, 5 Search Modes, New Higher Frequency 10 kHz, Digital Target ID.

STURDY BUILD WITH DETAILS：Metal UHF wireless receiver and UHF handheld microphones are designed to last, suitable for heavy use. Each mic comes with anti-rolling rings for better protection and color coding. AA batteries are also included for your convenience.
25 ADJUSTABLE FREQUENCY: State-of-the-art circuitry designs 25 adjustable frequency sets for this cordless mic set in 500MHz band, allowing up to 25 units to use at the same time without interference. You can also enjoy the freedom of changing frequency if preset frequency failed. Operation distance is up to 200ft in open space line of sight.
STABLE WIRELESS PERFORMANCE: High quality cardioid capsule and improved circuitry design can capture sound and transmit smoothly without dropouts, hiss, or feedback, delivering robust, clean, and stable sound quality, ideal for applications like church, weddings, public speaking, instruction, conference, and outdoor events.
BOX CONTENT: 1 x UHF wireless receiver, 1 x user manual, 1 x power adapter, 1 x 1/4’’ audio cable, 4 x UHF wireless mics, 2 x antennas, 4 x anti-rolling mic protection rings, 8 x AA batteries.
DEVOTED SERVICE: Genuine Phenyx Pro audio products come with 12-month manufacturer assurance and supportive customer service. Welcome to com....

... Control: -to +6 dB. High Frequency Level Control: -to +6 dB. Low Frequency to High Frequency crossover: 100Hz to 1 Khz x10 range: Changes . Low Frequency to Mid Frequency from (100 Hz to 1 kHz) to (1kHz to 10 kHz). Switchable 2-way stereo or 3-way mono operation. Subwoofer out. Subwoofer X-Over Freq ( 30Hz 200Hz ) adjustable. Subwoofer Gain -6 to +6 dB.
Specifications: Each output is -3 dB at the selected crossover frequency value. Outputs are essentially flat within their relative passbands. Distortion: Less than 0.02% THD @ +4 dBu,@ 1 kHz. Hum and Noise: Crossover controls set @ 1 kHz, all level controls set at 0 dB.
22 Hz to 22 kHz, unweighted gain @ 0dB(ref +4dBu) - 90dB. Low Frequency Output: -86 dBu below 80 dB. High Frequency Output: -84 dBu below -78 dB.