Hollyland LARK M2 DUO Wireless Lavalier Microphone System with Transmitter & Receiver up to 300m Range, 48kHz / 24bit, ENC Noise Cancellation, LED Indicators, Built-In Batteries, 40-Hours Battery Life for Camera, iPhone, iPad, Android

LARK M2 WIRELESS MICROPHONE 

Product Specifications: 
● Mic Sensitivity: -37 dBV ± 2dB @ 1 KHz, 94dB SPL
● Wireless Modulation Mode: GFSK 2 Mbps
● Transmission Range: Mobile Version: Up to 1000ft (300m) for LOS/200ft (60m) for NLOS Camera Version: Up to 1000ft (300m) for LOS/130ft (40m) for NLOS
● Mic Polar Pattern: Omnidirectional
● Frequency Response: 20 Hz–20 kHz
● Signal-to-Noise Ratio: > 70dB
● Sound Pressure Level: 115dB SPL
● Bit Depth: 24-bit
● Sample Rate: 48 kHz

Battery Voltage 
● TX: 3.87V Camera Version
● RX: 3.87V Mobile Version
● Mobile Version Charging Case: 3.8V
● Camera Version Charging Case: 3.8V

Battery Capacity 
● TX: 97 mAh
● Camera Version RX: 145 mAh
● Mobile Version Charging Case: 750 mAh
● Camera Version Charging Case: 1950 mAh

Operating Time 
● TX: About 10 hours
● Camera Version RX: About 9 hours
● Mobile Version Charging Case: > 2 times charging for the whole set
● Camera Version Charging Case: > 3 times charging for the whole set

Charging Time 
● TX: About 1.5 hours
● Camera Version RX: About 1.5 hours
● Mobile Version Charging Case: < 1.5 hours
● Camera Version Charging Case: < 2 hours

● Charging Temperature: 0° C to 45° C
● Operating Temperature: –10° C to 45° C

Dimensions 
● TX: Approx. D26mm x 9.9mm (1.0” x 0.4”)
● Mobile Version RX: Approx. 40mm x 16.5mm x 9mm (1.6” x 0.6” x 0.4”)
● Camera Version RX: Approx. 40mm x 25.7mm x 20.5mm (1.6” x 1.0” x 0.8”)
● Mobile Version Charging Case: Approx. 75.8mm x 49.8mm x 35mm (3.0” x 2.0” x 1.4”)
● Camera Version Charging Case: Approx. 86mm x 54mm x 39mm (3.4” x 2.1” x 1.5”)

Weight
● TX: Approx. 9g (0.3oz)
● Mobile Version RX: Approx. 6g (0.2oz)
● Camera Version RX: Approx. 14.8g (0.5oz)
● Mobile Version Charging Case: Approx. 65.6g (2.3oz)
● Camera Version Charging Case: Approx. 111g (3.9oz)