Saramonic Blink 500 Pro B1, Compact Wireless 2.4 GHz Two-Channel Microphone System, Consists of 1x Blink500 Pro RX, 1x Blink500 Pro TX, Blink500 Pro B1 charging case and 1x SR-M1 lavalier microphone with omnidirectional characteristic, Range up to 100 meters, Battery life: approx. 8 hours, Frequency response: 50 - 18000 Hz, Sound pressure level limit Built-in Mic / Lavalier Mic: 120dB / 110dB, Sensitivity: -39dB, 3.5 mm TRS input and output, Receiver has a separate headphone output, Battery operated transmitter and receiver, Built-in displays, Dimensions transmitter (W x H x D): 57 x 38 x 26 mm, Dimensions receiver (W x H x D): 56 x 38 x 30 mm, Weight transmitter / receiver: 32 g each, Charging Case: Charging capacity: 1200 mAh, Dimensions (W x H x D): 123 x 40 x 102 mm, Weight: 0.2kg@+*Accessories included:*@+@+, 1x Zipper bag, 1x 3.5 mm TRS to TRS cable, 1x 3.5 mm TRS to TRRS cable, 1x USB-C to USB-A cable, 1x Micro USB to USB-A cable, 1x Lavalier clip, Windscreen for lavalier and built-in microphone