Introduction: BOYA BY-M1 is an Omni directional lavalier microphone, designed for Smartphones, DSLR, Camcorders, Audio recorders PC etc., it is perfect for video use. With Omni pickup pattern, for full 360° coverage, it absolutely gives you the possibility to capture anything in your sight. Moreover, the integrated 6-meter (20”) cable with 3. 5mm 4-pole gold plug is just a second thing to be connected to your smartphones and most of your cameras. 100% a good choice to be picked. Super sound for presentations and video audio recorders Kindly Note: 1. For Smartphone: Switch off the microphone. Slide the ON/OFF up to OFF/Smartphone. The power is shut down. 2. For DSLR, Camcorders, Audio recorders, PC etc.: Switch on the microphone. Slide the ON/OFF up to ON. Specification: Transducer type: Electret Condenser Polar Pattern: Omni-directional Frequency Range: 65Hz ~ 18KHzSignal / Noise: 74dB SPL Sensitivity: -30dB +/-3dB / 0dB=1V/Pa, 1kHzOutput Impedance: 1000 Ohm or less Output Connection: 3. 5mm (1/8¡) 4-pole gold plug Battery Type: LR44 (Included)Dimension: Microphone: 0. 7x0. 3x0. 3 inch (18. 00x 8. 30 x 8. 30mm)Audio Cable: 20ft (6. 00m)Package Contents: 1X Boyar Omnidirectional Lavalier Condenser Microphone1XLapel Clip1XFoam windscreen1X1/4¡ adapter1X LR44 battery1X English User's Manual