The Archer SR8 PRO are gyro-stabilized receivers with a built-in 3-axis gyroscope and 3-axis accelerometer, they have 8 high-precision PWM channel outputs and features multiple flight modes and configuration methods. They support full-range signal strength with dual detachable antennas it guarantees optimal antenna-reception and maximum range. In addition to all this, the SR8 PRO can also be used as a redundancy receiver along with any other FrSky ACCESS capable receiver equipped with an SBUS port.

All of the Archer receivers are hyper-matched with the ACCESS protocol. They not only feature wireless firmware upgrades and increased range and telemetry performance, the SR8 Pro now supports more functions like configurable telemetry power, S.Port/F.Port switching and FLR output. Additional valuable features are under development to unlock the true potential of the ACCESS protocol.

FEATURES

ACCESS protocol with Over The Air (OTA)
Built-in 3-axis gyroscope and 3-axis accelerometer sensor
Multiple flight modes and configuration methods (LUA & Freelink)
Supports signal redundancy (SBUS In)
Full control range with telemetry
S.Port / F.Port
Anti-interference in spark-ignition
External battery / device voltage detection

SPECIFICATIONS

Dimension: 47*26*15mm (L*W*H)
Weight: 15g
16/24 Configurable SBUS Channels
8 High-precision PWM Channels
Operating Voltage Range: 3.5 -10V
Operating Current: 55mA@5V
Control Range: Full range* with telemetry
(*Full Range: ＞2km, range may vary based on local conditions.)
Voltage Measurement Range via AIN2 (External device): 0-3.3V
Compatibility: All FrSky ACCESS transmitters

From: https://www.horusrc.com/en/frsky-2-4ghz-access-archer-sr8-pro-receiver.html