digital display 0.28 inch 4.7V-30V DC voltmeter( 2 line )สีน้ำเงิน

digital display 0.28 inch 4.7V-30V DC voltmeter ( 2 line )สีน้ำเงิน parameter: Voltage range of 0.28 inch voltmeter: - Power supply range:No need for additional power supply, directly use the tested voltage as the power supply, the range is the same as above - Highest input:DC30.0V . Note: Input voltage higher than 30V may be permanently damaged! - Allowable error:1% ; when greater than or equal to 10V , the error is 0.3V ; when less than 10V , the error is 0.10 - input resistance: 100K Euro - Working current: Red 23mA - Refresh rate:About 300mS once - Display method:Three-digit 0. 28 "LED digital tube - Display color: Red - Lead length:15cm - 0.28 inch voltmeter size range: Dimensions - 23 x 1 0 x 10 mm , length X width X thickness (without mounting ears); - Length with mounting ear: 33mm - Mounting holes - Pitch: 2 . 8 mm , pore diameter: 2.8mm