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https://www.hytera.com/en/product-new/accessories/audio/sm27w1.html

SM27W1 Wireless Remote Speaker Microphone
Audio
It works with ADA-01 to form SM27W1-A1 kit for meeting police dispatch.

Specifications of Hytera SM27W1
Specifications
Weightabout 120g
Colorblack
PTT Keyavailable
Emergency Keyavailable
Microphone Sensitivity–42±3 dB @ 1 kHz 3.0 V 2.2 K, 0 dB = 1 V/Pa
Speaker Power2 W (rated); 2.5 W (max.)
Speaker Impedance4 Ω±15% @ 1 kHz
Speaker Frequency Response83±4 dB @ 1 kHz 1 W/100 cm
Communication ProtocolBluetooth V4.0
BT Range8–10 m
CertificationCE, FCC, and IC
Battery Life≥ 15 h (5/5/90)
Charging Time≤ 3.5 h
IP RatingIP54
Operating Temperature–20℃ to 60℃
Storage Temperature–20℃ to 60℃

Hytera (SZSE: 002583) is a leading global provider of professional communications technologies and solutions. With voice, video and data capabilities, we provide faster, safer, and more versatile connectivity for business and mission critical users. We enable our customers to achieve more in both daily operations and emergency response to make the world more efficient and safer.