Specifications: The product’s RF modulation works through Gauss Frequency Shift Keying (GFSK). It uses the frequency band 2.4G (2405-2478MHz). The frequency response is 35Hz-14KHz3dB. Signal/Noise is 84dB or more. Distortion is at 0.05% or less (32ohm, 1 KHz, 65 mW output). FR output level is 3mW. Earphone output level is 32hom, 65mW. It has a strong reception sensitivity of -90dB+/- 3dB / 0dB=1V/Pa, 1KHz and features an audio input connector which is a 3.5mm mini jack. The operation range is up to 50m (164 ft)(without obstacle). Power is required by 2 x AAA battery(not included). Consumption power is at Transmitter:3V/70mA and Receiver:3V/70mA. The Transmitter & Receiver Size is at 4.5 x 7 x 3.5cm/ 1.8 x 2.8 x 1.4in. Transmitter & Receiver Weight is 47g/ 1.7oz(without battery). Features: The product is a digital wireless microphone system (one transmitter, one receiver) and it is compatible with smartphones, DSLR cameras, consumer camcorders, PCs, etc. The 2.4G wireless technology adopted ensures strong anti-interference ability and high performance. The operation range is up to 50m(164ft) without any obstacle. It comes with an omnidirectional lavalier microphone that provides clear sound recording, perfect for interviews, audio recording, video recording, etc. The product includes a standard camera shoe mount and a backside clip convenience. It is lightweight, compact, easy to carry, and is accompanied by a hard case for convenient storage and mobility. Package Included: 1 x TX4 Pro Transmitter 1 x RX4 Pro Receiver 1 x Lapel Microphone 1 x 3.5mm to TRS Audio Output Cable 1 x 3.5mm to TRRS Audio Output Cable 1 x Cold Shoe Mount 1 x Windproof Cover 1 x Clip Images of the product: