***Please PM First if you are interested in the purchase. ***Please PM First for staff/seller to check available stock!! Description: (100% Guarantee Original Product) BOYA BY-WM4 PRO K1 UNIVERSAL LAVALIER WIRELESS MICROPHONE FOR CAMERA NIKON/SONY/CANON/SMARTPHONE Warranty: 1 YEAR WARRANTY. BY-WM4 PRO system is a new generation 2.4 GHz wireless microphone, dual-Channel for capturing audio with dual subjects to your smartphones, tablets, DSLR cameras, consumer camcorders, PCs, etc. The system offers an up to 60m (197ft) line-of-sight operation range. Specifications RF Modulation: GFSK (Gauss frequency Shift Keying) Frequency band: 2.4GHz (2405-2478MHz) Frequency response: 35Hz-14KHz±3dB Signal/Noise: 84dB or more Distortion: 0.05% or less (32Ω,1 KHz,65mW output) RF output level: 3mW Earphone output level: 32Ω,65mW Reception sensitivity: -90dB +/- 3dB / 0dB=1V/Pa, 1kHz Audio input connector: 3.5mm mini jack Operation range: 60m (197ft) (without obstacle) Power requirements: 3V DC (Two AAA size batteries) Consumption power: Transmitter: 3V/70mA Receiver：3V/70mA Dimensions: Receiver: 45x70x35mm (1.8*2.8*1.4 inches) Transmitter: 45x70x35mm (1.8*2.8*1.4 inches) Weight: Receiver: 47g (1.7 oz) Transmitter: 47g (1.7 oz) Package Includes: 1 * Lavalier / Lapel Mic 1 * Transmitter 1 * Receiver 2 * Cable 1 * Adapter 1 * Windscreen 1 * Clip 1 * User Manual(English) 1 * Carry Case ***Camera, Smartphone /Accessories are NOT included.