Feature

* Clear recording sound

* Compatiable with smartphones, DSLR cameras,Consumer Camcorders, PCs etc.

* Light and compact for easy carrying

* Omnidirectional lavalier microphone

* Easy to use

* Hard case included standard camera shoe mount and clip included

* Up to 25m (82ft) operation range

* Power

Feature

* Clear recording sound

* Compatiable with smartphones, DSLR cameras,Consumer Camcorders, PCs etc.

* Light and compact for easy carrying

* Omnidirectional lavalier microphone

* Easy to use

* Hard case included standard camera shoe mount and clip included

* Up to 25m (82ft) operation range

* Power Supplied by two AA batteries

Specifications

RF Modulation: GFSK (Gauss frequency Shift Keying)

Frequency band: 2.4GHz (2405-2478MHz)

Frequency response: 35Hz-14KHz±3dB

Signal/Noise: 76dB or more

Distortion: 0.1% or less (32Ω,1 KHz,65mW output)

RF output level:2 mW

Earphone output level: 32Ω,65mW

Reception sensitivity: -85dB +/- 3dB / 0dB=1V/Pa, 1kHz

Audio input connector: 3.5mm mini jack

Operation range: 25m (80ft.)

Power requirements: 1.5V DC (One AA size battery)

Consumption power: Transmitter: 1.5V/120 mA / Receiver:  1.5V/120 mA

Battery life: Transmitter: Approx. 3.0 hours / Receiver: Approx. 3 hours

Dimensions:Transmitter: 60mm x 86mm x28mm (W/H/D)

Receiver:60mm x 86mm x41mm (W/H/D)

Weight:

Transmitter: 136g (4.37oz) (Without battery)

Receiver:152g (4.89oz) (Without battery

Boya BY-WM4:

1x Transmitter

1x Receiver

1x Lavalier microphone