Audio Transmitter Receiver Multifunctional Audio Adapter Infrared Remote Control Bluetooth-compatible for Speaker Desktop Laptop Feature: 1. Strong Compatibility and Stability: The adapter has a beautiful appearance and an external 2.4G Bluetooth-compatible antenna. Designed with Bluetooth-compatible 5.1 chip of Mountain View, it has stronger compatibility and stability. The audio adapter connection is simple, without any driver and the cumbersome downloading of APP. 2. Built-in Rechargeable Battery: Built-in 1200mAh rechargeable lithium battery, listening to music for 8 hours, full charge for 1.5 hours, and battery life up to 30 days. Cool breath light, red/blue, soft and not dazzling. 3. Interface Type: Equipped with high-definition LED digital display screen, the working status and Bluetooth-compatible mode are clearly visible. Built-in digital to analog chip, supporting digital coaxial, AUX, RCA interface. Upgrade the NFC function, and the phone is connected at one touch. 4. Infrared Remote Control: It supports 5-8 meters infrared remote control (exclusive appearance patent design), and has all kinds of functions. Built-in DSP decoding, supporting bass and treble rotation adjustment. With an external 2.4G Bluetooth-compatible antenna, the transmission distance can reach 30-50 meters. 5. Four-in-one: Bluetooth-compatible reception (RX), Bluetooth-compatible transmission (TX), microphone singing, FM radio four-in-one design. Support USB (USB flash drive) and TF card playback and transmission. Support FM radio, external omni-directional adjustable stretch antenna, clear sound quality. An external 6.5mm microphone interface supports singing. Specification: Product version: M9/M9 Pro (optional) Product model:M9 (without FM radio function)/M9 Pro (with FM radio function) (optional) Appearance patent No.: 202230519049.3 Bluetooth-compatible version: Bluetooth-compatible V5.1 Main control chip: MVSILICON Battery parameters: 3.7V/1200mAh (including UN38.3 full set of certification) Full time: about 1.5 hours Usage duration: about 8-10 hours for listening to music and 30 days for standby Transmission distance: barrier-free 30-50m signal Interface type: 3.5mm AUX/2RCA/USB/TF/FM/6.5mm MIC Radio setting: FM 87.5-108MHz (support automatic/manual channel search) Input parameter: DC 5V-1A (MAX) Support protocol: A2DP/AVRCP/HFP/SBC USB flash disk/TF format: MP3/WMA/SBC/WAV/DTS/A52/FLAC/AAC/AIF/AMR/APP Usage: drive-free Product color: silver black Product material: high-strength fireproof - V0 PC (70%)+ABS (30%) Basic functions: Bluetooth-compatible reception, Bluetooth-compatible transmission, USB flash disk play (up to 128G), TF card play (up to 128G), FM radio, infrared remote control, NFC touch, microphone singing, high and low pitch adjustable, HD digital display, DSP, NFC Applicable equipment: all kinds of speakers, desktop computers, laptops, televisions, power amplifiers, projectors, etc Net weight of product: 143g Including package weight: 298g Product size: about 98 * 67 * 23.5mm/3.85 * 2.63 * 0.92inch (length * width * height) Bluetooth-compatible antenna size: about 10 * 105mm/0.39 * 4.13inch (diameter * length) FM antenna size: about 6 * 390mm/0.23 * 15.35inch (diameter * full length after lifting) Remote control size: about 126 * 41 * 8mm/4.96 * 1.61 * 0.31 inch (length * width * thickness) Outer dimension of package: about 147 * 117 * 40mm/5.78 * 4.60 * 1.57inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. M9 1 x Adapter host 1 x Bluetooth antenna 1 x 3.5mm audio cable (1m) 1 x RCA red and white lotus thread 1 x Infrared remote control 1 x Type-C charging cable 1 x Instructions M9 Pro 1 x Adapter host 1 x Bluetooth antenna 1 x FM radio antenna 1 x 3.5mm audio cable (1m) 1 x RCA red and white lotus thread 1 x Infrared remote control 1 x Type-C charging cable 1 x Instructions