ITEM NAME:1Pcs mini servo tester 4.8v to 6.0v STV2.3 BEC TestME Description: Size: 23.5×42×28mm Input: DC 4.8 to 6.0V Output signal: 1.5ms ±0.5ms Adjustment methods: manual, neutral, automatic. Package Includes: 1 x STV2.3 Servo Tester.Input: DC 4.8 to 6.0V.