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Best Choice Mingzhe 
Mingzhe 60MHz Function Signal Generator High Precision Digital DDS Dual-channel Function Signal/Arbitrary Waveform Gener Adopt MagicPulse Technology, Low Jitter(RMS)<200ps.Best Value Yuikome 
Yuikome FG-200 DDS Function Signal Generator Frequency Counter 0.01Hz -500KHz Signal Source Module Sine+Square+Sawtooth 2. Power supply: DC4-9V, DC5V is recommended when using adapter, 3.7V lithium battery is recommended when using batteryEMSea 
EMSea XR2206 High Precision Function Signal Generator DIY Kit with User Manual Sine/Triangle/Square Wave Adjustable Freq [DIY Kit] : XR2206 high precision signal generator DIY parts, need to be assembled by yourself.Gugxiom 
Gugxiom FG 100 DDS Function Generator, DDS Counter, Sine Frequency 1HZ‑500KHz, Counter Source Generator Meter, Used for MAIN FUNCTIONS: The DDS Function Generator works with oscilloscopes for testing and debugging electronic circuits, testiBehringer 
Behringer Steps 6-stage Multi-source Function Generator and Sequencer Eurorack Module 14HP Eurack Multi-mode Function Generat Module with 6 StagesEujgoov 
Eujgoov Salt Generator, Salt Chlorinator with Memory Function, Electronic Generator AC110-240V Electronic Generator Fail INTELLIGENT CONTROL: The salt generator adopts intelligent control technology, supports one-key start and stop, the elecKcolly 
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