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| FiiO BTR11 Portable Bluetooth Headphone Amplifier Specifications | |||
| General Specifications | |||
| Name/Model | BTR11 | Hardware Solution | Bluetooth: BES2700IHC, AMP: HT97220 |
| Color | Black/White | Volume Control | Physical buttons |
| Weight | About 13g | Dimensions | Approximately 55x19x14.6mm (including clip) |
| Status Indicator | LED indicator shows Bluetooth transmission codec, charging status, low battery reminder, etc. | Microphone | Supports Bluetooth voice calls, built-in omnidirectional microphone |
| Bluetooth Reception (5.3) | SBC/AAC/LDAC | Supported Impedance | PO: 8~100Ω |
| Bluetooth Codec Indicator | SBC: Blue light flashes once every 5 seconds | FIIO Control | Supported |
| AAC: Blue light flashes twice every 5 seconds | Firmware Upgrade | Bluetooth firmware can be upgraded via OTA | |
| LDAC: Blue light flashes three times every 5 seconds | |||
| Buttons and Interfaces | |||
| Buttons | Volume +/- buttons *1, multifunction button *1 | USB | Type-C (charging) |
| Headphone Output | Standard 3.5mm jack | ||
| Power Parameters | |||
| Power Supply | DC 5V/1A | Battery Capacity | 120mAh lithium polymer battery |
| Charging Time | <1.5 hours | ||
| Battery Life and Testing Conditions | |||
| 3.5mm Headphone Output: ≥15 hours | |||
| Audio Input | Bluetooth reception | Codec | AAC/SBC |
| Volume | 40mV output | Gain | N/A |
| Display Status | N/A | Playback Track and Format | MP3 44.1KHz/16bit |
| EQ | Off | Load | 32Ω |
| 3.5mm Headphone Output: ≥8.5 hours | |||
| Audio Input | Bluetooth reception | Codec | LDAC |
| Volume | 40mV output | Gain | N/A |
| Display Status | N/A | Playback Track and Format | MP3 44.1KHz/16bit |
| EQ | Off | Load | 32Ω |
| Audio Parameters | |||
| Headphone Output Performance | |||
| Output Power | 30mW(32Ω)/ 6mW(300Ω) | Signal-to-Noise Ratio | ≥115dB |
| THD+N | <0.003% | Output Impedance | <1Ω |
| Channel Separation | >75dB (1kHz) | Frequency Response | 20Hz-90kHz (±1dB) |
| Bluetooth Parameters | |||
| Bluetooth Version | 5.3 | Transmission Distance | Up to 10m (without obstacles) |
| Bluetooth Protocols | A2DP, AVRCP, HFP, HSP | Supported Codecs | SBC, AAC, LDAC |
| Power and Battery | |||
| Battery Type | 120mAh Lithium Polymer | Charging Time | Under 1.5 hours |
| Battery Life | Up to 15 hours (3.5mm headphone output) | Standby Time | About 200 hours |
| Other Features | |||
| Microphone | Built-in omnidirectional microphone | Firmware Upgrade | Via OTA (Over the Air) |
| Controls | Physical buttons (volume, multifunction) | Input Interface | Type-C (for charging) |