Bluetooth T10 Car Kit Handsfree MP3 Player FM Transmitter Product Features:Support Bluetooth hands-free phone calling via its built-in microphoneNoise and wind suppressed by CVC technology to create full duplex sound qualitySupport mobile's A2DP function. Music will be played directly while the mobile phone is connectedAuto pairing once turns it on.support TF card expansion play MP3 / WMA format music;Support MP3/WMA/FLAC from Micro SD / TF card. ( Support 1G - 32G Max )Turn on the battery voltage detectionEasy and safe to answer the telephone; Caller ID.Boot automatically after power back to the company, it automatically enters pairing state;comes with car charger, output 5V-2100m, can charge handheld devices. Product Specifications:Input voltage: 12-24V Output voltage: 5 v + / - -0.25 Output Current: 1000mA (MAX) Short circuit protection current: 2.4 --3 Bluetooth:Bluetooth version: V3.0+EDRFrequency: 2.402-2.480GHzSensitivity: -42db +/-3db 360Voltage: 5V +/-0.5Working current: 45mA(max)Standby current: 25mA(max)Effective distance: 5mRF output: 4dBmFrequency:FM Frequency: 87.5-108.0MHzTransmitted power: 87 dBuv/107dBuvEffective distance: 2m Thank you for choosing this product! B071JN6KWQ