Speaker Specifications
Impedance 21±3.2Ω
Sensitivity 85±3dB（At1KHz）
Frequency Range 20-20K HZ（Output S.P.L±20dB）
Rated Output Power 18mW
Max Output Power 25mW
THD ≤3%（At 1KHz，1MW/0.146V）
Diameter ∮16.2mm
Microphone Specifications
Size 3.76(L) x 2.24(W) x 1.1(H) mm
Sensitivity -44±2dB，f=1KHZ，0dB = 1V/Pa
Directivity Omnidirectional
S/N Ratio 56dB,S/N f=1KHZ,S.P.L = 1Pa

Specification

Chip Type PAU1603S1R1
Bluetooth Version V5.0
Transmit Power Class 1， VBAT=3.7V 9.5±2.5dbm
Operating Frequency 2.4G ISM Band（2.402-2.480GHZ）
Sensitivity -87dB (BER，<0.1% BER)
Signal To Noise Ratio 97dB
Frequency Range 20-20KHZ（AP525 /-3dB Close EQ）
Charging Voltage 5V
Operating Voltage 3.7V
Support Agreement HFP v1.7 \ HSP v1.2 \ A2DP v1.3 \ AVRCP v1.6 \ SPP v1.2
Charging Time About 2h
Charging Current About 200mA
Talking Current About 18mA
Musical Current About 21mA
Voltage Threshold 4.15±0.1V
Voltage Of Low Power Off 3.2V±0.15V