Product description: With measuring circuit the rapid changes, many electrical appliances, home appliances, and electrical and mechanical equipment using micro-controller, the measured signal frequency is increasing need a portable and handheld ScopeMeter test bandwidth, on-site maintenance. ET521S came into being, with the tide! Color display, less than 50M waveform test, excellent value for money, make your choice no regrets! Main features: 50M digital storage oscilloscope table (DSO) 10Hz to 156kHz function signal generator (DDS) Chinese help window, suggesting that the key functions and measurement matters DSO to achieve a key (AUTO) up to 40 automatic measurement storage / readout DSO waveform generated sine wave, triangle wave, sawtooth wave, square wave signal with oscilloscope function using both 320X240 3.5-inch color LCD display with LED backlight Built-in 1600mAh lithium rechargeable battery pack, composed of the test system, outside with the AC power supply adapter device applications: apply to the field of appliance repair, institutions teaching, research laboratories, industrial overhaul. Technical parameters: general characteristics 78 mmx 58mm backlit white display 320'240 dot matrix graphic color LCD viewing area 10 minutes automatically shut down power shortage prompted a storage capacity of about 3 hours of charging time is greater than 4 hours use time use environment 0 ° 40 sets of waveform records C ~ 40 ° C; <75% RH storage conditions of -10 ° C to 60 ° C; <90% RH Dimensions 186mm'86 mm'32mm Weight 490g (without other accessories) battery built-in 1600mAh lithium battery packs power adapter 110V ~~ 250V, 6V/1A protection type switching power supply ScopeMeter features analog bandwidth DC to 50MHz probe X10 DC to 6MHz probe X1 (3db bandwidth sine wave response) maximum real-time sampling rate of 200Msps vertical resolution of 8 bits coupling mode DC / AC indexing the vertical ± 4 div level of 10 div vertical sensitivity range the binary switch 10mV/div ~ 50V/div 1-2-5 base range 5ns/div ~ 2.5s/div 1-2.5-5 hex Switch the vertical volatility of accuracy ± (5% from 0.1div) time base accuracy ± (0.01% 0.1div) automatic zero calibration measurement mode conventional single trigger level ± 3.8 div (each step 0.04div) single trigger slope rising / falling edge position adjustment the ± 3.8div (each step 0.04div) automatically set to automatically set the cursor measurement function of the base and vertical amplitude dV dt automatic measurement function Vp-p Vp-Vp, f T automatic measurement Accuracy ± (5% 0.1div) waveform interpolation (sinx) / x Optional accessories: 521-F1 (color display and color combo signal generator) 100:1 (3000Vp-p or less voltage test) instrument probe sets : ET521S host 521S oscilloscope probe a, a signal output line, a power adapter, Oxford bags, product manuals, one (containing the product's warranty, users receipt). Zhengzhou Department of Electronic Instrument Co., Ltd. Tel :0371 -66959363 Fax :0371-66,959,363 QQ: 1,036,362,302 Sales: the Manager Zhao 13598018197 headquarters address: Erqi Square stuff Avenue and South Street Interchange Sun and Moon Star City, 19th Floor, A3