Product Name: Digital display Bluetooth adapterProduct version: Standard/RemoteProduct Model: Bluetooth Version: Bluetooth V5.0Chip: AC6951CBattery: 3.7V/400mAh(UN38.3)Using Time: Listen to music for about 6-8 hours and stand by for 30 Transmission Range: 20m ( free)Interface: 3.5mm AUX/2RCA/USB/TFInput Parameter: DC 5V-2.1A(MAX)Support Protocol: A2DP/AVRCPProduct Dimension: about 73x67x30mmUsing : Drive freeProduct Material: High strength fireproof ABS+PCProduct Weight: Standard version:68gBasic Functions: Bluetooth reception, Bluetooth launch, U-disk playback, tf card play, infrared remote control, key operationSupport Devices: All kinds of speakers,desktop computer, laptop, TV, power amplifier,projectorColour:blackMaterial:plasticPackage Contents:1 x Bluetooth receiver transmitter1 x RCA to AUX cable1 x AUX to AUX cable1 x Type C cable1 x English ManualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.